I am also experiencing problem 1 and 3 from there.
End of May 2017: funds are being withheld for no reason.
No response to support email or tickets.
Questions via troll box get banned.
These are very bad signs of going GOX!!!
This is my money you're holding, or is it now STEALING?
Is POLO going GOX?
Can't say much about it, I hope not. But I think it would be better now to start moving out of poloniex and use another exchange, but the process should be slowly.
Unfortunately I'd have to wait a lot to do that but I'll be on it as soon as I can.
Maybe bittrex is the solution for us.