Here are some things to consider regarding removing the tips
1. You won’t directly see all of the people who would be sharing in the auto tip. You will see your room steward and your dining room waiter and assistant waiter, of course, but the rest of the staff would be impossible to find to give cash tips to.
2. when you remove the auto tips, it goes as a black mark against those staff who are most directly taking care of you. That isn’t your intent, of course, but that is what happens.
3. after having removed auto tip, any cash tips you give to the housekeeping and wait staff must be turned into the pool so they don’t get to keep those directly anyway. Only if the auto tips are in place can they keep any cash tips that you give above the standard gratuity.