1. Everything a politician does is, by definition, political. That is why we call them politicians. The idea is that by making politicians do things to win votes we make them accountable to American voters. That's how the system works. I don't really get what your problem is.
2. An election is a contest that requires a solid grasp of strategy. A strategic move does not equal desperation.
3. This latest move puts Romney in a real tight spot. Obama has made a clear decision to address a problem that Romney admits is a problem. Now Romney is being asked for his solution. The problem is that Romney doesn't have a good solution that doesn't hurt him politically with one of the two sides he is pandering to.
This was a good strategic move on the Obama team's part.
4. You are correct that with this move Obama opens himself up to a charge of overreaching. But you are wrong to overestimate the effect and the strategy is to counter this with Romney's inability to articulate his own clear strategy or position on the issue.
5. The idea behind this executive order came from Hispanic community leaders and was discussed quite a bit in Spanish media for at least a couple of years. This isn't something that Obama thought up in desperation, it was responding to a core constituency that has been requesting this move for years.
If you ask why Obama didn't do this a couple of years ago, I don't have a good answer. His refusal to take this step until now was political calculus and one of the reasons I along with many Americans am disappointed with president Obama.
He still gets my vote.