Satsuki Azalea Backbud followup

So last month I posted a followup to my Satsuki Bonsai initial pruning that showed the back budding that was starting only a week after the initial pruning. You can see it has filled in a lot in only a few weeks.

The buds that where just forming:

have fully leafed out and are doing well:

Now the question... Should i trim back some of the older, unwanted growth to stimulate more growth in the new branches, or leave it be for a while longer? There are many lower branches where the long straight growth needs to be brought back closer to the trunk, to add movement if nothing else. Here is an example where the branch is really long and straight before it branches again into two (also long and straight) branches:

and another:

This little tree has come a long way from how it arrived home just a month ago:

I have a very limited number of Bonsai trees right now, so I'm a bit afraid I might be being too eager to trim this one again... What do other bonsai enthusiast think (especially anyone with Azalea experience)? comment below and let me know!