Well, let's just keep in mind that this
is primarily an aniverse roleplay. So it makes sense that Temrash would have the limitations that he does. There's a reason we outlawed Super Saiyan's and the like. If an Andalite, Hork-Bajir or well-armed human can't beat him/her then they are probably too powerful, no matter what 'verse they are from.
I don't see anything wrong with Temrash currently, as far as his abilities are concerned. Not everyone needs a superpower, especially since a reliance on powers tends to hinder character development (which is kind of the point of the bar).
Temrash is a good Hork-Bajir Controller. *pat pat*