they actually made some fairly big batches of payments on 1st march (UTC time) for each coin - so i would assume these include all the final withdrawals
It's misleading to say they made big batches. The size of the transaction might've been big but the payments were for really small amounts. I find it hard to believe that only people with around $5 worth of BTC had payments pending.
anyone still not received a requested withdrawal has probably had their account flagged, and shouldnt expect to receive it
That does not appear to be the case. Their selection on who will receive payment is based on how much funds are available in their hot wallet. They don't even need to bother with these arbitrary account suspensions. If they refill their wallets with more than a few hundred dollars then you might be lucky enough to receive payment otherwise you're just among the many who are being scammed.