but if you have the ZEC miner implemented in the Client then to you can mine anywhere you want you just give your arguments in the config. you can use any pool you want if your arguments you gave are correct! The only thing the developer has to do to implement the miners in the client the rest is up to the user! and this goes for all the miner apps implemented in this client!
Yes. The Client can use another config with example in Claymore Zec. It can handle ZCL, ZDash and another coins, but the website not handle it. I try release this night the new site and It will use new coins.

buy even if you don't get statistics on the web client you can still change the miners no? even with unsupported pools/coins? right now I do not really care about statistics that much. the main thing would be to be able to change miners and wattool config on everycoin/miner/pool there is