That is a good one!Make it explicit that Concentration is a general thing, not just for spells.
Yes please, better halfling art!I don't know how we went two pages without the most urgently needed change:
Make halflings look less stupid.
Can you give some examples of what might trigger a concentration check?I want them to in general drop the Damage Save portion of Concentration, and only have it for some spells in a case by case basis, such that it's written in the spell's writeup itself if a Damage Save is required to maintain Concentation. That may make it such that it other things about a spell that might trigger a concentration check, instead of damage.