I wouldn't like TNMB as much without Mike.
I wouldn't either, but I'd also absolutely still follow them closely. I'd follow Neal closely if he was writing prog albums with just a set of randos as the backing band, and I've come to really appreciate Eric Gillette and Bill Hubauer in their own right.
Outside of NMB and Transatlantic (where especially Neal and also other musicians like Eric, Bill and Roine generate a big portion of the interest for me), I share the sentiments that many are expressing about MP at this point. I hate to say it, because Mike is my all-time favorite drummer. But out of what feels like dozens of projects from the last 10 years, there's just not anything I'm particularly interested in. Not even Flying Colors really does a whole lot for me.
The plausible outcome I'd like most is to see at this point is for NMB to become the full-on "main" band for Mike and Neal. It would be beneficial to the other guys, who don't have a half dozen other projects on the side, and I think it's easily the most fruitful venue for both of them. I imagine this won't happen, in part because Mike feels the need to have a "metal" outlet, but the thing is, this whole "let me get together with some other veteran journeymen and toss out an album" thing does not really seem to be working. What I'd like to see him do at minimum is establish a long-term band with some metal musicians with strong songwriting skills, even if they aren't well-known (pretty much exactly what Neal did by bringing in Eric and Bill, who were complete nobodies, by the way), and put serious time into it—like, 45% of his time, with NMB at another 45% and TA/FC at 5% each. But I doubt this will happen, because he just doesn't seem interested in reducing the number of projects to give each one more focus, and because he seems more interested in making "supergroups" with semi-famous names and long-time friends of his than in putting together a strong, cohesive band.