xathil, you have this silly assumption that Elements is all about upgrades and playing AI.
If you are in to that stuff, then you can spend a lot of time doing that.
However, what is more fun is competitive PvP, which is mostly unupgraded and requires almost no grinding time.
So I'm really not sure why you think grinding is an important part of Elements. It isn't unless you want it to be.
It's silly insofar as I treat elements as another game i play. casually, maybe a few hours a day, maybe once every few days depending on my mood. Tyrants is good about that. I have an energy bar and a stamina bar. It takes me less than 20 minutes to completely drain both even at my slowest and at some point the "mandatory" grinding stops. Elements? If you want to be "involved" you need to a) join the forums b) wait for events to happen c) play regularly.
Weekend tournaments are mostly unupped? Great. Unfortunately weekends are also my busiest times because I do have a social life. Be it board games, a movie, dinner/lunch etc. Weekends are when I spend my time socially. I do all the anti social stuff like play elements in the dead of night or when I have down time during the week. Weekend tournaments dont work for me.
Likewise, things like WoE require too much time to setup, prepare for. Time I simply dont have. I'm sure it works great for anyone that does participate but my schedule isn't one that allows it. WoE's "show up at least every 2 days" for battles just doesn't work for me. Sure I know im not going to be in battles all the time. But I also dont have the same amount of free time (or mental energy) to keep up with something like that. Between keeping track of a character sheet, moving, and looking for opponents I'm supposed to fight.
If I decide to step away from tyrants? Nothing happens. My defense deck fights on it's own (and wins a good amount too) I simply miss out on exp/gold i could have gotten with my wasted energy/stamina. I'm one of the top 100 players in tyrants probably since I'm in the second highest rated faction (and the ONLY fights we lose are against the highest rated one) my faction IS strong enough to let people decide to take a break... which I did a few weeks ago when i went to Yosemite for a family vacation for 4 days. Unsurprisingly... I was still in my faction. Faction wars last 6 hours at a time. I can show up. I can be sleeping. Someone starts a raid? I can jump right in. I can ignore it. and raids require as much or as little player planning as you would like. You can start a raid and post it in the chat. or you can start a raid, and tell your friends. The line between public raids and private raids is fuzzy enough and they happen often enough that I can join either at a whim. Point being. I can get as involved or withdraw from the game as MUCH or as little as I want with very little notice on tyrants. I play on MY schedule MY terms. All the forums based elements stuff DOESNT allow me that flexibility.
So yes... for me playing the FGs (and thus upgrading cards) seems to be the limit of how much I can play elements. Let me know when there's competitive PVP at MORE times, MORE flexible. If anyone has played MTG drafts at all. Basically like that. They happen when theres enough people for them to happen. Or if they adapt something like the MTG tournament sealed decks. You get your cards (like WoE), then you can just play other people around the same rating.
Anyhow. Let me know when element's "events" stop being player run (which is HIGHLY time consuming for organizers) and gets coded into the game so its flexible for all players. like PVP1 (except with more challenge, better rewards, less bugs/dcs etc) Then sure. Maybe my assumptions aren't so silly after all.
EDIT: and for those who think warbonds are the start and end of tyrants... I highly disagree. I've spent probably 200 or so and I've paid 0 for them. You get WB randomly as you get nymphs from the Oracle and WB are about the same as nymphs. Very useful, very valuable but the game is still VERY much playable without them. And as an entirely free player, I can tell you I can beat players that PAID for most of their decks (you can see it from the cards they have multiples of) I still have an average win rate of about 90%+ on tyrants. I AM one of the top players but I dont buy warbonds and I'm not playing 24/7. Warbonds only give you a VERY small SHORT term advantage that smart, long term playing will eventually overshadow. Honestly I feel warbonds are probably one of THE better free2play mechanisms designed so far out of all the games I've played (and I've played a good few free2play... but quit most of them because they were more pay2win than free2play with the top of the game requiring pay2win stuff to get through) but tyrant's simply isn't one of them. Sure it's not as deep a game, but the mechanics and gameplay are solid for a free2play game thats still highly strategic but still allows a LARGE degree of freedom in a sporadic, persistent environment.