Hi there, yes! Samples and wavetables are stored seperately and self-contained in the preset file. So you can delete the sample to save space once you have converted it to a wavetable. Vaporizer2 follows the idea to have a preset file that brings everything with it and does not hold links to pathes that might not exist. This ensures portability to other systems.
And yes, the MSEG sync / grid is in the backlog.