I've suspected much the same, and they've essentially indicated it with a couple "no time for that now, working on Expansion" posts.
It's unfortunate in my opinion, because the current issues are already dissuading folks from making the Expansion purchase. I've known 2 players thus far who play together regularly, one lost their stuff Reincarnating and now both don't play. Both are looking forward to Ravenloft, both are now hinging their purchase on the affected one being made whole. Idk how common or uncommon that situation is, but I doubt I've met the only folks in DDO to find themselves in that boat.
Then there's folks like me who are currently just "mooching" (as one poster put it) our way through, as we've already bought most of what we want; and while we'd like to support DDO - the game we enjoy(ed), we don't want to support the direction DDO is developing in.
Then theirs folks dissatisfied for whatever other reasons (Stealth players perhaps?) who may well be holding thier funds in reserve too.
Individually, probably just drops in the bucket. Collectively, likely still not "a lot" but then DDO/SSG doesn't seem to have "a lot" to spare. It's my hope that Ravenloft does what they financially need it to do, and that then allows the breathing room to get busy fixing important broken stuff and add some CS. Given they've now either had to take time away from Ravenloft development for the MM & ASAH shinangigans or place the ASAH & MM UI on "temporarily unavailable" status (likely costing them revenue from $hard $ales) until Ravenloft development allows attention to those issues too...
My hope is not my expectation.