These pre season changes sound nice, but only make the top lane problem worse.
Creating an alcove does nothing but promote junglers camping top lane. Nerfing jungle exp nerfs does nothing but exacerbate the jungler skill disparity. Nerfing bot lane exp does nothing but promote more junglers to camp top lane in which case you can only hope your jungler does the same.
Riot's balance team doesn't get that top lane's flaw isn't being behind in terms of exp but the fact that the lane is easily dominated by the team with the better jungler, coupled with the fact that top laners barely get to make a difference in the overall state of the game during the laning phase and are punished severely for ever leaving lane (courtesy of turret plates).
The scuttle changes sound good on paper, but doesn't really do anything to help the jungle pressure top laners usually face.
The scuttle changes also do nothing to help the ranged vs melee matchup.
If RIOT really wants to fix top lane, they need to start working on making the lane less vulnerable to jungle pressure, and at the very least fix the ranged vs melee matchup problem. Along with that help top lane integrate better into the game rather than be "that extra lane with Jax and Fiora who will sneak your turrets sometime late game while you're busy fighting".