1. Right now there are no plans to increase the level cap from 100 but it's possible in a future update. Raising the level cap requires a lot of new content. New maps, monsters, dungeons, quests, items, updates to ingame systems for the new level etc. etc. so it's something that takes a long time to pull together - so it's not something that will come by surprise - you guys will know well in advance that it's coming when I decide to start working on it.
2. Again, nothing planned right now, but adding a new class to the game has always been on my todo list - but other things always end up taking priority. I feel the current classes have a lot of room for improvement still before adding more to the mix. It would be fun to have a brand new class though