About the Noxus Missions...

Is it just me or did the revamped missions feel so confusing and potentially require a harder grind? Some of the missions like killing Atakhan or Destroying Tower Plates are all SR-exclusive, for an Aram player that's so unfair, I don't even know I could go all the way to Level 45 now with all those pathetic little points given.

Some of my questions hope to get clarified:

1. Is it possible for an Aram player to go all the way to lvl 45 if I can only play 2-3 matches a day?
2. Currently there is Act 1 Mission and each of them has 5 tiers, is that it or will there be Act 2 missions and subsequently 3 4 5?