They look better divided. Good job!
I think your brassia looks fine except as you admit, you might have damaged the plant with severe drought at some point causing the plant to drop leaves prematurely and some of the surving leaves are crinkled.
Drought at the wrong time will also cause no flowers.
For example, these plants spike as the new growth matures. When you dry them badly, then there will be no spikes.
So try and water diligently while it is growing and continue on until you see flowers.
After flowering is done, drought may do less damage but try to water it good at all times.
I see many keikis sprouting in older leafless pbs.
They should grow to flowering size in time.
Make sure you water it good, otherwise you will see this kind of "disaster" again.
With so many years you've had this plant, it would have formed a large specimen with multiple flowering spikes all over.
At least, now you are starting over with multiple plants!
Good luck!
Oh, regarding the light, it is fine where it is.
Brassia needs bright light, but no direct sun as many orchids do.
Usually they grow nicely with cattleya or slightly less light. So where it is now with other cattleyas of yours is fine.