Sorry, but no.
The merc has both two guns and a back missile launcher. However, the only special thing the powertech has got is a jetpack. Now you want to give them both a jetpack. This means that the number of powertechs would greatly decrease, because this one would have nothing special anymore.
Please, just lets keep the jetpacks for the powertech, its the only thing which makes this adv. class unique.
Oh yes, isn't Boba Fett more kind of a powertech?