From a Commander only perspective ...
I like both these cards. I saw
Orcish Bowmasters and immediately thought it's additional redundancy for my
Queza, Augur of Agonies deck; I saw Mirwood Bats and thought it's additional redundancy for my
Ob Nixilis, Captive Kingpin deck. Do I think they can be abused and become totally busted in someone's deck? Yes, of course. Most cards are. The two decks I mentioned above can be built to be a terrible experience for the playgroup. Do I build that way? No, because I like to be invited back
Do I ultimately mind that these cards are in the format? Not really, but I have an established playgroup and we let each other know if some combo we've managed to build into our decks is killing the fun. That won't stop some of our group from keeping them in, but maybe they'll reduce the tutors in the decks. Or I'll keep a bit of interaction aside when I know some has these cards. For me, I often just won't put them in. I haven't put
Sheoldred, the Apocalypse in my Queza deck for just this reason - sometimes it's overkill and it can ruin the fun.
So for me, I come down on the side of it probably will not affect me much so I don't mind. It's a selfish way to look at it, and I sure am glad I am not on the Commander Advisory Group or the Commander Rules Committee to have to make those kinds of calls. They banned
Hullbreacher and it didn't make a bit of difference to me, personally. Would I mind if they banned these cards? Not at all - I think it's not necessary, but it will mean I don't have the headache of deciding what to cut from my decks in order to fit them in at least.