I 100% agree Blad.
As for the sets, I'm certain we can rest assured the gear for IB and factions will stay the same until a year 2 or season 2 drops like SteveO mentioned. For example, the next time IB comes around, I only need the legs for my Hunter so once those drop, then I'll just focus on playing with my other two characters finishing their sets.
Factions is where it's trickier IMO. For example, I only need the NM helmet for my Titan. I don't want to have to choose NM again for him next round for just that piece since they can't change allegiance during the faction rally, which sucks.