Valve is never going to care about the competitive game enough for the global white list to even matter or be relevant to the scene, most of the unlocks are just plain silly for competitive play, tons of people dislike them and should be removed. Salvage what we have already for the competitive scene because its beyond help from valve at this point and its not going to see major growth in any form, so I don't see the point in adding in an array of unlocks that just, in my opinion, ruin the integrity of the competitive game. Mind as well enjoy it while it lasts IMO.
Id love to see arrows banned for many of the reasons marxist described and also arrow building is actually a completely unfun and stupid mechanic to play against. all the recent medic changes have lowered the class' skill ceiling in general and have made uber pushes/exchanges a complete bore to execute. nothing can be done about the medic speed mechanic but it 100% has made bad medics good and if you don't think so you're just wrong honestly.
also just another personal opinion on a particular unlock, I honestly think cloak and dagger was one of the worst inclusions into the competitive game, completely takes the skill (timing) out of actually using the class and making a play with it. it is just another unlock that just ends up rewarding bad players.