DL Parc does need more capacity, but WDSP needs it more. And will continue to for a few years yet.Because their focus has been on the park that needed an overhaul. DLP is doing just fine at present. Right now I have far more trust in those running DLP than I do with those running WDW.
If Disneyland got something with an ORC north of 2k in Adventureland, something similar in Fantasyland and something attractive in the Discoveryland Theatre it would be approaching perfection distribution wise. Bonus point for using the Pizza Planet plot for its original intention too.
A no brainier would be Runaway Railway next to small world, but it would be a no brainer in WDSP too - and that needs it more. And of course more appropriate. I dare say the DCA / MK Mermaid would be a good choice for fantasyland where the IP would be suitable.