The battlewasp synchro isn’t. . . Terrible, but isn’t great at all. The spellbook quickplay is generic spellcaster support, Chimeraflessia is a good engine card, the speedroid synchros are generic, weird, but generic. Chain hole will just get better with age. I am pretty sure it could be great once we get more boss monsters with negation.
Speedroid synchros are generic, but hampered by other things they have.
Kendama needs Machine for its burn effect and a 2200 ATK piercer is just so-so, Puzzle is a level 4, how many synchro deck can easily summon a level 4 synchro? And Hagoita needs to tribute itself for its effect, meaning you go -3 just for a temporary 1 level boost, plus its revival effect has very specific restrictions.