(Started to be written @Hector, but meanders once I get behond the first sentence/paragraph...)
But to never consider beyond the immediate issue..?
I think there are many hurdles, and I think that reconstruction (in the not unhoped for futures, at least) and internal reconciliations and (possibly[1]) dealing with any unacceptable pre-existing issues of corruption and the like... they cannot be indefinitely deferred from consideration. Difficult to plan ahead, but also an important message to all concerned to consider it a possibility. Provocative to Russia (be careful with that, they may violently take against it and decide to ...invade? Oh, wait!) and strengthens ties to those that have already pledged (to varying degrees) their support.
The big problem is the dissenters within the EU (one major suspect, on that line, and possibly others, but maybe more "Match, Skinhead and 3-D" to the quite obvious Biff Tannen), or indeed NATO, who will counter even a reasonable opportunity in the future if Ukraine has fixed its current issues but other places have not. (Or at least still have a powerplaying head of state, which time may also manage to cure by one or another outcome.)
[1] I have no knowledge of such things, save that I would expect them in any government system (including my own). And, with the prejudice born of the West, very much so in those systems only recently dragged out from the Soviet system, with hold-outs and claw-backs alike fearing the more idealistic practices of democracy, or usurping and using those less savoury aspects. The irony is that Ukraine has done quite well to actually emerge from under the old non-Western system, unlike some notable neighbours, which is of course much of what has frightened those neighbours' more despotic rulers[2]. In other parts of the world we have seen successful popular revolutions do much worse.
[2] And now, in turn, these rulers' actions have frightened other leaders of nations that, by my understanding, are nowhere near as reformed/reforming as Ukraine. Which is a strange scenario.