Go for it. Cant hurt to try it, as CleanBelwas said. Personally I hate picking my Urza deck and my friend saying ugh, and grabbing Baral. Or me playing my Krenko deck, and my opponent grabbing elesh norn, which still has yet to beat my goblin deck, but it's the sentiment I dont particularly like. At the same time though, I did make a post about a silver bullet cEDH deck. I think that if all the decks are on the same power level, then you shouldn't need any silver bullet decks. I think in that case, where the decks are the same power level, this works fine because everyone is putting in their silver bullets for whatever commanders they think are the problem.
Also, while I don't enjoy
pithing needle,
nevermore and similar cards, I feel like they're necessary sometimes and this would increase their playability, at least in the sideboard. You can sideboard those cards without them taking a slot in the 99, and if there are no commanders that look to require a
pithing needle, it can stay out of the 99.