Logged on last night to see Season 1 is over and S2 won't start until September with 10 more matches needed.... yuck. It does look like they changed the ranking system quite a bit for S2. Similar to Hearthstone you will be rewarded off the highest rank you achieve during the season.

So I decided to try another class - this time Soldier 76 for my first "Offensive" hero. Got pretty good with him especially when I had a healer. Love the sprint and healing aura deal.