Agree completely. I've deleted the F2P version, and will not buy another game involving BigBen.
I can't say that I wasted the cash, as I have got many hours of game play out of the content however I would have been very happy to continue to pay for continued expansions, whereas they have now lost my cash not just for these games but all future ones.
It is such a colossal missed opportunity - the dev team are clearly committed and competent, the base game is superb, and with some open communication, a clear roadmap and some good promotion this could have captured a large player base