Except that Steenee has barely done anything in the interim. And Lana just getting Dewpider after it's evolved and likely passed needing any development seems a bit like a cheap short cut, unless it has some recurring appearances to develop it with Lana like Litten and Krokorok with Ash.
This is thinking about captures more than just as a numbers game and to say 'they had more than one', this is to help them stand out and develop. I think this is why people could stand Ash getting less and less Pokemon per series because it's so most of them will stand out and bond better with Ash than say, half his OS captures. But at the same time Ash keeps a recurring minimum so he has more to branch out how he progresses in his goal and for them to all interact and gain more characterisation from each other. It's hard to begrudge any of his SM lot, even Poipole, they all stick out well and help give Ash an extra level of prominence and character, not to mention a nice selection of abilities to show his resourcefulness.
Marowak and even Charjabug have also done more to reason their existence besides to say their trainer caught another Pokemon, due to taking part in some key activities, having a characterisation, and some form of bond with their trainer and team mates that plays into their own development. Turtonator started to stick out more after Marowak appeared for example.
