Seems to be CCP’s recent MO - retire useful things, then give vague promises on restoring functionality sometime in the future, in the meantime you can use this thing our players have made better somewhere else for free. This is like retirement of EVElopedia and its fiction contents all over again, it took them a year to make the fiction portal a reality after they said it would “take a couple of months”, and now it has been 6 months since it was opened up, and the fiction portal is still full of dead links and as far as I can tell there has been no new articles in 4-5 months.
If you have trouble undestanding how frustrating this is to me as a roleplayer, then imagine if CCP retired POS’s because they couldn’t be arsed to fix them, and introduced replacement structures only a year later, leaving you with nothing in the meantime.
Someone really should tell the higher ups at CCP that you don’t generally replace useful things unless you have an adequate alternative ready. As far as I understand, there isn’t a good alternative for the EVE Gate or its most used feature, composing mails while out of game.