5e just came out - and it's really not all that different than 4e, unlike the 3e-4e shift. Get the old stuff, tweak it until it looks right as compared to other stuff in its class, and go with it until we get to that point. Remember that 'early in the edition' it's always the same in regards to requiring house-rules for stuff from a previous edition; the devs simply cannot convert everything simultaneously, so be patient. With 4e, there was a lot of stuff from 3e that had to be house-ruled all the way to the end, because they didn't provide the deep game-system development for 4e the way it had been for 3e.