Personally I'm strongly opposed to a character having more than one Lightsaber form, as each is a distinct fighting style which would have to be learnt at an instinctual level.

In the canon most Masters only know two forms, after spending decades both training and gaining field experience in real combat, notable exceptions being Yoda, Cin Drallig and Soru Bulq, all of whom gained the title of swordmaster having mastered six forms, and Mace Windu who mastered seven, having replaced the Juyo form with his own Vaapad style instead. All of these Jedi were in their later years, all over the age of fifty at the time apart from Yoda who was over 850.

To presume that characters as young as most of those taking part in the RP have greater skill than a seasoned veteran seems a little out of place, no matter how much training they may have done in the last ten years.