Does anyone know how to travel to previous acts during the game without resetting your quests? Once I arrive on Act 2 all my way points from Act one seem gone. am I just not looking in the right place or did they really loose that aspect of the game?
At this time there is not the ability to do that. Everyone is hoping that along with the itemization fixes coming that this comes back. It was one of those really pointless things to remove, especially for engame people. People also want to have the bosses all spawn in their respective areas to make farming easier (especially for plans) since they wouldn't need to leave the game and reset it every time they finish their run, they can continue on to the next point.
Does anyone know how...
Yes, someone knows how. Probably quite a few ppl, actually.
Unfortunately, the ppl that programmed this game are not among them. :P :(
Outside of hacking there isn't a way yet. Please add this Blizz, we would all really appreciate it, especially in inferno. Also make the bosses always spawn so that we don't have to do the associated quest just to fight them (sometimes it makes getting the NV stacks really difficult when going after them like Rakanoth and Iskatu in Act 4. I don't think those guys ever get fought anymore and Rakanoth is an enjoyable fight too.