it is just my opinion.
Disney Studios park is the worst disney park by far imo, and even when the new frozen area/lake is done in 2-3-4 years it will still be the worst, but at least it wont be a bad park. It only has a couple good rides.... It has ToT (the smaller not FL version) Rat (a good dark ride) Crush Coaster (a good little coaster i'd like to see in USA) and the new avengers campus with webslingers and a reimagined Aerosmith coaster that has less than good reviews.....Also the Cars ride that looks terrible as well as the flying carpets and 4-5 other small kids rides....So yeah....not that great of a lineup imo.
DisneyLand Park is much better and is probably the most beautiful park but also lacking major rides. You got Thunder Mountain, Phantom Manor, Pirates, A great classic style Fantasyland with 5-6 small darkrides, IaSW, Space, Speedway, Astroblasters and a small indiana jones coaster. not a bad lineup at all, I esp like the fantasyland area but a lot of the rides I listed I dont like, Im just listing the more major attractions. IaSW, Speedway, AstroBlasters I dont care about, and SM makes me sick although Id still do it just because. No Jungle Cruise, No Splash, No Indiana Jones Darkride, No ToonTown....I feel Paris DL is lacking a lot. But is aestheticly very pretty.
Honestly I think Im spoiled cause I live near DL in California and thats the best park for rides it seems by far. Both parks in Paris need a ton of work, luckily Disney is investing into the Paris resorts but even with the 2+ billion investment, DL isnt getting anything new and Studios is still....it is what it is.