I dont like this new leveling up system introduced in the April update. Yes, I have gone up 16 light levels in a week but that's a dedicated week of playing nothing but Destiny all week. The biggest problem I have is the 1-6 range of light levels you will get whenever you go up a level or earn something from the raid or nightfall. I almost always get something in the 1-3 range which sucks because most of the times I am getting these items with the same light levels for weapons or armors I already own.
It really sucks to waste 125 motes upgrading your faction to get an item with the same exact light level as the one you already have. Last night, I went kinda crazy after the exotic i earned from the crucible turned out to be 329 leg armor even though I already had a 329 leg armor. I proceeded to transfer all the motes of lights, weapon and armor parts, ammo synthesis and spirit blooms from my other characters and upgraded three more times and had the same thing happen to me two more times. That's literally hundreds of motes of lights, weapon parts, armor mats and dozens of ammo synthesis all wasted. I did luck out on the last upgrade and got a 328 chest armor which finally brought me up from 325 to 326.
I guess all these dups will make it easier for me to quickly bring up my alt characters, but it's extremely annoying to play all day, upgrade three different factions and level up just once.