The thing with Tsuburaya, is that unlike Toei, they USUALLY put a lot more effort into their shows, and as far as Ultraman goes. Yes, we don't get a new show every year like we do with KR and SS, but WHEN we get one, they are usually very good.
Sometimes it feels like Toei just wants to spit out all they can, in order for Bandai to sell toys, and then everything that is called "overall quality in story writing" is put on lowest priority
I have heard very little complains of any of the newer Ultra series, and I'd rather have them air a new show every 3rd or 5th year that has good quality writing and new ideas, rather than having a show every year that mainly focus on spitting out toys left and right.
God forbid that Toei ever gets the rights to Ultraman.