A lot of people are using TR to fix old builds that didn't quite work out or were killed by changes to the game. Because of the change of programming direction, things that work well L1-12 stop working in GH. Many people were caught by changes in the way game features work over time, or the introduction of things like PrEs or capstones.
Rather than make people grind a build they don't really like all the way up to 20, how about giving a double price TR option from L16 and a tripple price one from L12? Even if you limited it to chars without past life feats so that people could pay their way to completionist it would be a real boon.
I'd really love to unretire my L14 mule but I can't bear to play him to cap. I know other respecs are comming some day, but TR is what we have now and we know you are having trouble on getting full respecs working.
Come on... doesn't break the game...money to be had...happy customers to be had.