I really, really wish this show was all about Mike.
Careful what you wish for, they'll make a show about Mike 20 years ago when he was an accountant, and it'll be all about the office politics of his accounting firm, with just the barest hints of the badass that he'll one day become.
Honestly, while this show has its moments, it's a pathetic shadow of what it should have been. When Breaking Bad ended, people asked for a spin-off show about Saul Goodman because he's such an awesome, hilarious character. What did they get instead? A show about his distant past at some random law firm and a few tangentially involved weirdos. Who can seriously say this show is about Saul Goodman?
Two seasons in, where's Saul Goodman? Where's the actual character that people wanted more of? I fully expect this show to get cancelled after S3. It isn't actually delivering what people asked for, and while it hasn't been bad as such, it's living mostly off the back of Breaking Bad's characters and the mental association with the futures of these characters. S2 has led almost nowhere in terms of character development.
The longer this drags on without providing Saul Goodman - the thing that people asked for - the less interested viewers will be in these long-winded episodes about Hamlin, Hamlin & McGill. The show simply isn't providing on the demand that sparked its creation. People are already wishing it was more about Mike, who makes up a few minutes of each episode. People already want something other than Jimmy & Kim. People want Saul Goodman and the crazy criminal world that he tackles in hilarious and charismatic ways, not stressful lawyers and a bunch of crap that we know leads nowhere because we know which characters are and aren't still around in the future.
It's a show that has failed to deliver, has failed to provide what was asked for by the people who generated enough interest to get this show funded. The still-living hype around Breaking Bad has kept it afloat by association, but viewers won't be patient forever. S2 has made absolutely no progress in the character development of either Jimmy or Mike. They're still precisely the same, they're nowhere closer to being what it was that people wanted when they asked for a show about Saul Goodman.