My solutions were:
1. U' R' U' R U'
2. y x' R2 U R' U R U' R'
3. z2 R U2 R' U2 R' F R F' R U2 R' U R U
4. y R2 U2 R' U R U2 R' U'
5. y z R U2 R U R2 U' R U' R' U2 R U2
So 1 and 2 were the same moves but a different orientation and 4 was the same solution entirely. Your solution on 5 is definitely better than mine lol idk why I didn't do that (Also a tip, use R U' R2 U R2 U R2 U' R and its inverse and mirrors for that CLL on your third solve as your main algs)
And inspired by you I tried downsolving them as well and got 0.55, 0.64, 1.26, 0.81, 1.10 (with your solution on the last one), so 0.85 average. Pretty ridiculous.
@NigelTheCuber (a.k.a. 'the guy with whom I was tied for 2x2 average with a time of 2.42, which I will never forget, but who now is 3rd in the world, somehow') what can you do on these scrams?