EOS had what was to us an essentially "surprise" hardfork and it takes a long to replay EOS in such a condition. We've been replaying for several weeks now. If it takes much longer, we may look for some way around the issue until the replay finishes.

USD tether can be exchanged on multiple blockchains. Initially it was released on the OMNI network (which is an overlay network on top of Bitcoin's network). But eventually they added support for exchanging USD Tether over Ethereum as well. Virtually all our users now use the Ethereum network now for exchanging tether (cheaper and faster), so we haven't bothered to restore the OMNI wallet, since it would most likely just lead to user confusion (and increased fees if they used it). We may just drop the omni version from our web page unless we see a request to restore it to functionality.