I get the idea behind that, but since you are going for a Wario/Pizza Tower like gameplay, you want to optimize flow, so Slam -> Bash is a good flow especial since you can Bash out of Rocket, where Slam -> Jump -> Bash is probably fine but is not intuitive, nor indicated, simple intuitive controls makes the system easy to learn and harder to master, then you can make levels that push that mastery, having 1 extra button press for a perceived reward, isn't all that rewarding and becomes tedious after the reward has been found, especially when it could have been 1 single button.
The Reward should be in the smooth and simple flow of gameplay and not the "tricks" that are found to make that happen, the cool tricks need to be something special, like the slide jump dash in Psuedoregalia, or the jump dash reset in Celeste, those are both "bugs" that where made into features for players that found them, in a Wario/Pizza Tower like game a player would expect to be able to dash once on the ground.
also I think you should keep the attack through 1 block wide geometry activating stuff that can be used for good secrets and is a real "ah ha" moment.