It is great to hear you guys coming back, I hope you will have a long and lasting business with this that will eventually enable us to play pvp games all the time, not just one or two but eventually reach to hundreds of games we can play against each other.
Do not really worry about the time because ETA is as important as your marketing budget, you can be gone for years and as soon as you return back and give people some money to play (as in faucet) or signature campaigns or marketing in a different way and spend money to be on public's eye again, all of those people who left will comeback and some more.
Hence, ETA could be years and you will still be fine, do not try to rush these things since rushing and making a half product is worse than slow but steady development. Slow could be fixed with marketing but half product can't. Which we can clearly see you already know since you are taking your time and doing best you can.