Surely OT has evolved and could potentialy create another masterpiece, but now the situation is so different, at those times it was supposed in a way to replace Katatonia, while now Katatonia still remains the main band and I don't think it's easy for both Jonas and Fred to put so much effort in another band, which surely is not like Katatonia, but had the same vain....
I think sometimes if you have a side project you tend to do something completely different compared to what you already do in your main band...(see Diabolical masquerade, Bloodbath, Subdive...they have nothing in common with Katatonia).
Then you have to consider that if Ot could be resurrected, they should also find someone who can do the harsh vocals, because I doubt Jonas is willing to do that and choosing clean vocals instead....well that could be like creating another copy of Katatonia..IMHO.
I was pretty sad when I heard Diabolical Masquerade was dead and surealy all of us would have liked to hear more (especialy after Death Design, which for me was their best release), but it comes the moment when a band dies and has nothing to tell anymore...
I know how hard it is to accept such things, but, even if the fans demand a new OT album, I don't know how much effort it requires to set up this project again, I'm just sceptical Jonas and Fred have the time and the will to concentrate on Ot again.
But if this statement by Jonas you quoted is true, maybe we can still hope...
Fred or Jonas should have the last words about this.