Question 1: What was the maximum level you reached during Alpha?
Punisher lvl 29
Question 2: What level did you have the most trouble with leveling above or did leveling become more difficult?
I didn't have to grind before the level 27 to 28 but I did a lot of PvP battles. However with my medic (lv 20) the grind starts at lvl 18 ><
You need to do PvP to xp fast, so I guess the level up will be really hard for PvE players (and medics
Plus with more players, you'll get more xp in PvP and less mobs to grind in PvE.
Question 3: What are about a few "important" levels that really opened the game up or had really interesting content?
Level 15 for Janus, 17 for the mech and 23 for Caergate (open PvP zone).
Question 4: If you ever made an alternate character, at what level did you stop leveling them up at?
I had a medic lvl 20. Other toons didn't go farther than lvl 10.