Biggest problem with floaters and feeders is that you are using stabilized chlorine and your stabilizer level is constantly climbing. Once it reaches a certain point your stabilizer is just too high and the chlorine cannot work properly. Most of the people on here use unstablized chlorine (bleach or cal hypo) and add stabilzier to the water to the proper level. If you want to continue using a feeder I would strongly suggest getting rid of the Hayward and getting a Rainbow. The Hayward CL200 is notorious for just not working very well. It's ajustment of chlorine feed usually just doesn't work. It's either opened or closed! It also restricts the water flow through it.

You must make your pool store very happy by using lithium. It is the MOST EXPENSIVE form of unstablizied chlorine and it is only about 35% availabe chlorine. It's primary advantage is that is is very fast dissolving and doesn't add calcium. Sodium Hypochlorite (Liquid Chlorine and Bleach) is a lot cheaper to use and mixes instantly since it is a liquid. The pH of both of them is very close (both around 11) so in either case you might need to add acid to keep the pH down if you give up the trichlor, which is very acidic.

Biggest downside of floaters is that they are IN the pool. IMHO, only an issue if you have small children. In that case I would just take the floater out when they go in the pool so they don't play with it.