Improving your swimming is not about finding and using as many drills as possible.
It's about using the BEST drills.
THAT's how you make progress.
It makes sense to try new ones to see if they work for you.
If they do, and they work BETTER, than others for the same skill, drop the others and start using the new ones.
It's all about efficiency.
Why waste time with the second best drill?
Use the best one, and if you need some novelty, add some speed or some training equipment.
Use the BEST.