unfortunately, decks like pdials and swallow have a good fighting chance against... I don't know, 80 to 90% of the deck archetypes?
When creating an arena deck, I ask myself if it would win from the following 4 decks:
-pdials
-swallow
-vdb
-SoB air rush
If it only works against 1 of these, I know it will quickly lose.
It is possible to soft-counter them all by using a novabow with gravitymark...
including purify, chargers, plagues, and gravy shield + PA. That works surprisingly well.
Also, I went through your list, and... from this list alone, I can not agree with what you see as 'original' and what not.
The ones that seem to return all the time are mostly SoV-based decks and quanta denial.
Quanta denial can be done in many ways. As can be a rush.
You've stated that you liked a rushbow (20) because it can be done in so many ways. Why not the same for quanta denial?
Any mono is boring, including
(26). Except for when the mono
includes SoP (3).
tsunami + SoP is boring (10), probably because its a form of quanta denial, but SoP + wardens is cool (48).
But adding poseidon in this deck (or drawing it) makes it suddenly boring?
tl;dr: From this list, I think you are not very consistent with what you call creative and what is boring.
Of course, this does not include the other 3950 games you've played.