What I'm trying to say is that the situation is much more complex than trapping them on Tuchunka to easily keep a vigilant watch on them there. The idea that any one can forcibly move them there to me is implausible given their extension across the galaxy and damning, given that the planet looks like it cannot support that much life on it. More than likely the Krogan are going to be living elsewhere, either on colonies that the Krogan representative is fighting for, where they currently exist, or somewhere like the Terminus systems where Council influence is practically non-existent. I think the political situation after the conflict is going to be too complex than to simply isolate them on Tuchunka.
The planet still hold billions of Krogans, and we've seen that it might be on the way back to supporting a lot more during the Tuchanka arch.
And confining them there might not be easy, but they can't be allowed to grow their population unchecked. It's simply not a viable life strategy for the galaxy. Even some Krogan, especially Wrex who seems smarter than the rest of the lot, should be able to understand this.They don't? Well tough luck, war will be necessary.
Their spread around the galaxy is not that big a problem if you ask me. (and any Krogan not on Tuchanka when the cure is dispersed aren't cured, btw, for what it matters) They are still without a fleet. What are they gonna do? Start a guerilla war? You bomb 'em. They start fights in the streets? You shoot 'em. Regardless, they will not be a threat to anything with an organized military, or even a good police force, without the ability to come together, organize and conduct proper war, for which they will need a fleet.
I don't cure the genophage because I like the Krogan. I cure it because I need them and the genophage is barbaric, but if they go back to their pre genophage antics I'll have no regrets wiping them off the face of the galaxy. They're getting a chance to solve their issues, they should take it.
Whatever shape the council takes after the war, the krogan are just as much heroes as anyone else left in the galaxy, probably more so than some. They'll be given colony rights somewhere. The turians at least will back them right the hell up when they want to colonize a planet or two. And if they're told they have to stay on Tuchanka, I wouldn't blame Wrex for starting another war, no matter how peaceful and diplomatic he was trying to be. That's what started the krogan rebellions in the first place, IIRC.
Then war it is.
There are a lot of factors that tie into your EMS total after Tuchanka, and I dunno if I did the math right or not, but it appears that curing the genophage gains you 150 more EMS, at the absolute minimum, than sabotaging it.
Krogan War Assets
I could be wrong. If someone else wants to do the math and prove it, it's all good, heh.
Only if Wrex is in charge. Sabotage is better when Wreave is in charge.