I'd be interested on it, would definitely make Cybran and UEF suffer less on those maps where Zthuees and Aurora tend to have easier time and make land more relevant on maps like Roanoke where its all navy and air. However, I worry about how it could affect balance.
I believe it could be really good for more variety of strategies since currently, t1 navy feels like it lacks interaction with the rest of the game. Win t1 air? t1 bomb stuff, do drops, etc. Win t1 land? get more map control and mex, reclaim, etc. Win t1 navy? You'll be lucky if some mexes are near the shore, otherwise it doesnt translate to any game winning thing (yes t2 navy exists but you cant win with only t1 navy unlike t1 land only and t1 air). Specially on maps like Setons where it feels like rushing t1 navy and winning your pond doesn't lead to anything meaningful.
Plus the idea of a D-Day style dropship with 20 tanks just coming from the coast sounds very cool.