Yes, too much love could kill succulents :)

1. make sure they are in well draining mix - I would suggest changing yours, it looks too water retaining for ho Fla

2. I would say that there are too many varieties potted together - if you want 'community container', research first needs of every one to make sure they have similar needs. Sticking to fewer would make it easier to take care of. And too many different ones sometimes look like mixed bag...Some would look much better in a hanging pots, like string of pearls and burros tail, hey grow long branches that are better hanging down.

3. They will like good sun, but should be acclimatized to lots of it gradually. That is why you have some 'fried' leaves. Can't do anything about those, they will fall off, but it could be prevented.

I agree with everything Rina says:) If I could put my 2 cents in you may want to try smaller pots. I've found usually succulents love to be crowded, and like to compete for space.