As far as coastal goes, do avoid the French tree, it’s been added in about the same state as the French tank tree was, with a sad reserve (for comparison, UK reserve is already bad with 8*7.7mgs, the French boat has a single pair), a somehow sadder “top” tier, and not much of anything noteworthy inbetween. If you want to gamble on the tree being short to go trough it quickly and wait for Gaijin to fill it with stuff that’s actually good,o keep in mind that the comparatively more popular bluewater French tree has yet to receive a top tier.
Japan is a good balance of not being bloated while still offering mostly fun stuff, with some lobby killers like Chikugo that are near unstoppable outside of a mirror matchup.
If you don’t mind going trough a slightly more filled TT, either germany or the USSR are the best fun you’ll get out of coastal, with both trees offering at worst decent boats at all tier, and the best top tiers coastals in the Köln and SKR.
Looks like there were reports made even as late as 4 months ago regarding the ship. Did you log in to WTM using the same account as your WT one? People were told to contact GJ support via the link provided.