Right. It's very frustrating to have to look for a yellow flag after every great play. I have suggested for years a partial solution for at least some of the OL holding penalties.
It should be mandatory that every Guard and Tackle wear a modified mitten , something less bulky but similar to a boxing glove. I realize that OL would still be able to arm bar and essentially tackle a pass rusher, but I think that it would reduce the flags which we all find annoying.