yeah the middle left actually has been connected as well, one of the final projects todo actually. i might help you out on some idea's and suggestions for 3.0, im also gonna start up my own map-project sooner or later again, i just have to get some good idea's on cityscaping and a climate i want to work in (most likely im going for an arctic setup, as i like mountainranges but then having realistic sized cities & distances like cindini has is not going to be easy.
really great map to play on, but i will comment some suggestions a bit later for 4.0, its been a while that i commented on it, last time was on the pre 1.0 stuff if you remember that?\
it so nice with the desert and the somewhat lake i have on it, but your version of it is more or less wtf....
(EDIT: its 2 tiles that block the whole s*** from flooding, fix those 2 tiles and its way better)
still not sure how much i like the new extra L bend of that river though...
similar issues for the Endirez Water Reserve and the Roderez Water Reserve. i really liked that whole river/water flowing to the sea there. i understand you want to make the desert more try, but i think the change of small bit of water was not that bad. maybe introduce a canal via locks there, with some "green" edges on the " man-made" canal?
similar issues with some other spots. some of your town-extensions make sense, others do a bit less, ill send you a modified version by myself soon so you can see my changes (typing/screenshots sometimes are too much hassle, seeing what i mean is way more insightfull