I feel the card is still weak, if there are few characters it gives a very small buff.. Yet if there are many the "turn not attacking" is worse than the +1/+1. Well apart from counters to sos...
I'd up it even further to something like: "+2/+1, +3/+2, +4/+4"
I agree with this.
Notice two point:
1. If you have many creatures on the field, shard of patience will give a lot lot advantage, but it useless because u are almost to win.. So, Shard of Patience should not be played (except for some special creatures such as ball lighting or special event such as counter to SoS)
2. if you have only few creatures, it means only give small buff. It is also useless.
increase to "+2/+1, +3/+2, +4/+4". I absolutely agree. But, it means, the cost should increase too to 5 or 6.
I like Shard of patience because it is creative. It motivates deck with creatures, not like other Shards that motivate creature-less decks.