everyone needs somewhere or something to strat off with as a base, i took the outline of the sovereign, and heavily modified it, then edited it how i say fit to make it more like the regent than the sovereign while still retaining that sovereign-esque look. the only thing from the original regent is the bussard collectors and the ribbing idea on the saucer, the rest of it is just from playing around with the design.
But i can see what you mean by a kitbash, but bear in mind that my design is still a WIP, there are still elements from ships that i havent used that are in the current STO Regent class design.