I am in total favour of this. Without these two weathers weatherless would become more viable because it creates options for dealing with weather outside of bringing your own. With swift swimmers becoming viable again with the resurgence of regular rain HO becomes less viable. Team building will improve in flexibility because you don't have to run one specific pokemon that is also crap. I ran a successful sun team with a Ninetales with no moves, just a punching bag. Team match-up is actually causing wins and losses from the start in this metagame because of them. A metagame where killing A pokemon that doesn't do shit but switch in them switch out so you can switch in your weather pokemon then die is a win condition isn't a good one.