I think one important factor to consider in terms of what to put at Acme is that the current ITG crowd is, for the most part, an ITG-exclusive crowd and I don't see too much interest toward other music games coming from the newer players.
For example, DM gets occasional play from a couple of the newer players, but after that, it's played by those of us who have played it for years and the occasional casual player. With Davyn and Mykl gone and KDDR, Keby, and the other people who used to play set after set not going as often and very little interest to replace the lost play time, DM is sitting there unplayed more often then not, even on the busiest night. DM (followed by Pop'n) always seemed most likely to draw enough interest to get new regular players, so I'd be inclined to say that, sadly, no other music game is really going to have enough draw to keep it afloat at Acme.
Also, Technika being the exception, GW's crowds are casual players looking to sample everything and Acme's crowds are players dedicated to one or two games only. A very interesting looking niche game can survive at GW because there will always be a few dozen new people per day who think it looks kind of cool and will try it once or twice. This also lets them get away with subpar maintenance - only expert players will notice (or care that much about) the machine giving errors, and pleasing those few expert players represents very little revenue against the cost of proper maintenance given how quickly a machine will degrade when played constantly by GW-sized crowds of players.
GW having everything was always a bit of a draw, but I haven't played any Taiko in my last half dozen visits because the line is 6+ sets long (entirely casual players, I don't think Taiko would do that well at Acme), I avoid DM because Acme has V3 and the GW machine isn't in the greatest condition, I avoid Pop'n because there's usually one dead or impossibly sticky button, I avoid Technika because of the line, and ultimately, I wind up playing a few sets of X2 before getting bored and leaving (I'd play some Extreme, but it's in terrible condition more often than not) - X2 is fun, but I get bored playing only one game over and over.