I had discussed that with
ThunderboltDragon- which my main concern was that resources we're being transferred to Sanctuary even though my needs were already met, but I guess that just meant my needs were met by my other settlements. I think I mentioned before that I have every settlement in the Commonwealth- excluding Bunker Hill and Warwick Homestead claimed, all my settlements that aren't player made- these are ones I had a hand in designing like most of the settlements I've posted pictures of excluding The Castle and Spectacle Island use ROTC city plans.
It's weird how HQ doesn't take priority, I assumed that any trade agreement with HQ would mean that the settlement would focus on giving surplus to it rather than directing it to settlements in need especially if you've claimed half the Commonwealth- with the exception of products generated through production plots.
I've relied on ROTC because I can't remember if the regular plans level-up, when the mod came out it didn't seem like the base plans leveled. I didn't want to deal with designing each settlement- I like building but my player built settlements took sometimes days to buildout. designing 6 settlements is good enough for me. Unfortunately I found out that ROTC isn't stable after heavily relying on it- I had done a playtest on my girlfriend's computer (it's essentially a potato) and couldn't even go to a settlement using ROTC without an immediate CTD. I recently bought a new high end desktop because my gaming laptop that I usually play on is still being fixed and I've been having CTD periodically in ROTC settlements (not nearly as much as my girlfriend's PC) along with the occasional power bug were I have to rewire the entire settlement because the rebuild power option in the workbench isn't an option- at least not for me because I will CTD while it's active I thought maybe it was on my end then I looked it up an noticed a few people have been posting about the same issues I've been having so that was kind of a relief. Greentop Nursery is a permanent no fly zone though, as soon as I get within viewing distance of the place I CTD which was annoying because I needed to go there for one of the Concord quests (had to use console to advance the quest), but otherwise the ROTC plans have been looking really cool I never got to see how these plans leveled up before. It doesn't seem like there are any other options when it comes to city plan collections so I'm stuck with ROTC, don't particularly feel like searching for 32 different plans when I'm already pushing 230 mods as is.