more likely to retire the older kits than they are to update the plans for them
Yep, could well be.
Whilst building the -4, yes a long time ago, I quickly realised not to fully trust the plans... nor the manual. Cutting the VS/HS T piece out of the blank according to the plans, and then one would quickly find out that, though spot-on given the measurements, it would then be too small to comply with edge distances... lesson learned early.
Revisions for the plans came, occasionally, printed out in the RVator (IIRC), and one had to make them directly on the paper plans, good fun really, and part of the build.
Ok, let's put these stories from another time aside.
Commitment & dedication:
Anyone engaging her/himself in building an aircraft does commit to a certain amount of work. We've seen the evolution thru the line with pre-punching (or pre-drilled), pre-punched to final size, quick-builts, etc.
Fact is, even the most finished quick-built kit will require a certain amount of commitment and dedication. And this will involve delving thru the inventory, into the plans and what's now called KAIs. This is, and has to be, part of the process, or shall I say, learning experience. And the very definition of that aircraft category.
Yes, it could be better, it always can, but I'm sure resources at Vans are precious, and mostly geared towards the new model(s), design improvement on some older parts, and the normal runnings of such a manufacturer.
Today's builder has one huge advantage nowadays, the possibility to come to this site (and others) and learn all about the commitment and dedication you will have to apply during that build.
And then that freedom to make your own choice, as in "nope, too much for me, I'm gonna be shopping for a 2nd hand homebuilt now", or "yeah, let's embrace the challenges, all of them, and solve them as part of the process".