I have some questions regarding the new update and hoped somebody would tkae the time for some of them

First off: I have played MXL in singleplayer for quite a while, however the furthest I have gotten was terror act 2 with a trap rat build...i tried a lot of other builds but fell off after lvl 24/at tran athula
For the new patch i wanted to experience all the things of median and so I ended up here

1. A lot of ppl talked about holy melee paladin for the new patch. I searched for some build guides but only found one for a retaliate build...is that really it? and will that get strong enough for all ppl to hype it or am i missing something?
2. Starter build: My idea to start is a fire/frost sorc since she seems buffed a bit in the update and it was the very first build i played in MXL. Is there any other build to consider when targeting endgame as fast as possible/get a first experience with heroics or ubers? I'm basicly open to all palystyles
3. Leveling tips: I know of prefered farming spots/runewords/TU uniques and i'm capable of reading the doc, however is there something more veterans might know and be willing to share?
4. For the first time I want to start playing in MP for the new patch, will the loss of plugY hit hard/require a lot of micro manageent since i am quite the hoarder since i fill multiple tabs really fast...i might be useless but i like to have it


5. Thank you for your time and consideration and hello MXL community, I'm glad to be here