At the German Video-Games-Convention gamescom 2012, Gaming Insight held an interview with the German SWTOR Community Manager Lars Malcharek.
Among other things the CM stated, that regarding class-balance, the Powertech / Vanguard would be subject of some changes.
I tried to translate the relevant part of the interview as literal as possible [sorry for my English]:
Q: 'Will there be upcoming class-balances?'
A: 'There will be class-balances, as always, because we constantly monitor the balance. How massive these changes will be, I can't tell right now, they should not be too harsh though.
What I can tell, because I myself was affected as a gamer, is that the Powertech and his 'jedi-counterpart' [he doesn't remember the mirror AC's name there] will be forced to enter melee-range more often than before.
This is, because both AC's wear heavy armor and carry 'big guns' [sic]. To compensate that, they should get in danger more often.
At the moment, the Powertech can safely position himself pretty much in the rear with some skills and therefore we did some minor changes. These are the biggest changes I noticed so far, that some skills were tweaked in a way that you have to be in melee range more often. Since you are in melee pretty often right now, those changes won't make such a big impact though.'
to the interview (in German).