I actually do like true toecaps (I haven't been a fan of the hybrid toecap design that Rome has been sporting recently) - but I don't think they are a must have feature... you probably can buy some toecaps and retrofit your current bindings.
In my opinion, I think your bindings still usable. The main job of the binding is to attach your boot to the board, and that really hasn't changed too much. In general bindings have just gotten lighter, with more adjustment options and are slightly more comfortable/ergonomic/responsive... but they are incremental changes (although 6 years of changes do add up). Always buy previous season gear... so maybe wait until the spring to buy whatever binding you are eyeing right now for 50% off. Also... it is often easier to adjust to new gear if you only change one item (board/boot/bindings) at a time.
Thank you for your advice. I think I go ahead and upgrade as-well, as it looks like these cannot be retrofitted with the "fast fit" toe straps..
Also I think I am getting the Rossignol Krypto instead of the One because I am more of a freerider.