PVP

In pvp, people will constantly switch out their monsters in battle so that they can have the elemental advantage. The game becomes a 10-minute long dance of monsters until someone finally gives up and either dcs or just loses on purpose. This is the reason most people don't even bother with pvp. I think in order to fix this, the amount of changes allowed should be limited to 2-3 per battle.

I think they should make a rule that when you switch a monster you must use at least one move before switching again... This will be much more fun and strategic because if you pretend opponent to switch and counter with your switch you get elemental advantage! Then after they that one round they can switch again but if they are too predicable you can bait them again lol

Really, having the moves Entwine, Fissure and Water Cell will stop this.
These 10-minute long battles were prevalent in my server but they stopped when everyone found out about Lupas!
But when the new server comes out, I suggest just getting even one of these moves. Trapping even just one of your opponent monsters will allow you to kill one of their elements and will solve this issue. ^^

actually in my server you run into people who curse then heal, then switch out over and over. This is something that completely takes away in pvp.

Strategy... If you know he's gonna switch to a counter for your monster, then switch to the counter to his next monster. I usually do this with either fire or plant monsters for a chance to poison or burn them.

Yes, as I mentioned: having moves like Entwine, Fissure and Water Cell may help you with that problem. I also think having status infliction moves like Poison Powder and Firestorm helps (like they did for me).
Good luck!