Ive never been to DSP, but from what I can see Id take DCA over it. The only major (e ticket) rides DSP has is ToT (smaller version) Rat (many argue not an e ticket) Iron Man Coaster (pretty weak from most accounts) and then the only big exclusive thing is Crush Coaster (seems really legit). In a couple years it will open its 1 more major ride in Frozen land with FEA and I do think its a good ride at Epcot but god damn, they could have done something much better, especially if its headlining an entire land and its in the weakest Disney park in the world..... or at least added another ride like HK frozen land
DCA has Grizzly River (I will admit my bias and say I love this ride) Incredicoaster (theming aside, great classic style coaster) Radiator Springs Racers (Cars land is one of the greatest areas in any park Ive been to and Ive never seen the movies) ToT (I like the retheme but its the same smaller version as DSP) and as for biggish exclusive things it has the Ferris Wheel (most underrated ride seriously) and a few solid none exclusives like TSMM and Soarin (which I love)
Its crazy that with all the work and expansion happening at DPS, its still gonna prob be the worst DIsney park, but at least probably not a BAD park anymore.
As for thematic messes, I still think CA has a very Cali centric theme though forced IP is making it less than ideal. DSP seems like once the new layout/lake pathway are done, the worst part of the park will be that Aladdin/Cars/Crushes Coaster area. I doubt Crush goes anywhere but maybe they could retheme the Spinner and Cars thing into Crush/Nemo/Mermaid aquatic theme that entire area like in TDS I dunno.