I think a big problem most people have when going on TRT (or reducing their current cycles to TRT level amounts) is after they get the initial benefits they are thinking 'I'm on the juice' (well yeah, but...) and start training harder than they can recover. Which is why they see little to no gains.
If your numbers are in the 1200 range, you should be able to maintain a solid built look to you. Not competition standards, but one that indicates you are above average in build and fitness.