ad_hoc
(they/them)
I think it inherently would already...after all, creating items (either temp or lasting) on the fly removes the concentration requirement.
Sure.
I just think that is the place to start. Both for design and balance. That is a strong and unique ability in 5e and gives the artificer a reason to be its own class.
I think it is a mistake to try to make it like 3.x or 4e.
It should reflect the system it is in.