Even if the mod stretchgoal is reached ( and I'm quite positive it will for now ), keeping the streams for future reference could also be very helpful !
If how the devs are using the tool currently doesn't match with what the users who get the new-and-more-user-friendly-editor will be using the tool, then no, it won't be helpful, it will be confusing.
It should be near enough - they aren't going to go out of their way to give us a tool that would be completely different from the one they will be using themselves.
I'd expect the "supported" editor to be maybe more functionnal and intuitive, but the overall rules should be the same. Maybe the menus will get a little different, maybe there will a bit more - or less - buttons, maybe the colors will change, but it probably won't be very much confusing than watching a tutorial video of YourProSoftware version 10 when today it's reached version 14. [hint from personnal experience, apart from a few technical differences, it's still completely viable].
What's more it's not only the
technical aspects of the editor that would be interesting to witness, but also the philosophy put behind the general design - environment, combat, story planification, npc placing, etc - as well as revisions. The only real issue I can foresee is not understanding why, say, Jeff went back and change the players spawn point, without the internal parallel discussions about that particular topic. But as long as one's interested and have enough of an analyzing mind, one should be able to deduce the logic put into the level design.
