No. They changed the effects of the pity pull for S2. Basically you have X amount of resets before your pity pull. The X changes depending on the tier your in. Roughly, Legendary is 250. Leg+ is 200. Leg++ is 100/150. SV is about 300 I think. Basically, you can switch between tiers as much as you want without resetting the count. BUT if you drop from SV to Leg++ and pull a Legendary, thats your pity pull, and you'd need to start from 0 again.
And no. You can't win SV in Leg++. That was a glitch in the original TRD.
Also Three abbreviated events in a week. One RD. One RTG. One PCC.
EDIT: Wait. Wrong. Not WM Tier. Just WM themed events. The cards are SV Event cards.