It sounds like you've already made up your mind to get park hoppers. I just wanted to point out that Disneyland.com lists 64 attractions for the Disneyland Resort, 31 of those attractions are at DCA. So the two parks are pretty evenly split with things to do. Of course some of those 64 "attractions" are better than others, as they're not all rides or shows (they include the shooting gallery and carnival games).
There's currently still no FP+ reservation system. Rumors of one coming have been around for a few years, but it looks like Disneyland has made it another summer without that addition. This could be good or bad depending on how you feel about FP+. You can't schedule your showtimes before you go, but you can be very flexible with what you do throughout the day. Currently there are only a handful of FP rides at each park. Toy Story does not have FP at DCA as it does at DHS. Also none of the Fantasyland rides have FP either, I know both Peter Pan and Pooh do at MK. So rope dropping is very important as it allows you to get on some of those slow loading rides quickly.
Some of the rides are basically the same, but some of them are pretty different. It's fun to compare, but try to enjoy them for what they are. Disneyland's Small World is way better than WDW as is Pirates. In WDW Space has single row rockets and Splash has double row logs, at Disneyland it is backwards with Space being double seating and Splash having single seating. Don't try to compare Matterhorn to Expedition Everest, they are not alike at all and there is a nearly 50 year difference in tech. Grizzly River Run is way better than the similar ride at AK, it has two good sized drops and no awful smoke smell. Of course our TOT, assuming it's still open, does not have the sideways movement the one in FL does. Our Fantasyland is not new and expanded, but it's still jammed with rides. I counted 13 rides in Disneyland's Fantasyland, but only 9 at WDW (I didn't count shows/character elements).
Study the maps of the parks to get a good idea of where things are laid out. Winnie the Pooh is in the back by Splash Mountain, and Splash is not next to Big Thunder. I hope you have fun planning your trip.