“Some point” can literally be anytime in the coming years.
We can’t make promises or even estimates about delivery dates, because software is notoriously difficult to predict, and things can change. If I say you will get X in August, I guarantee you will be 10 times more annoyed when it doesn’t arrive in August than you would otherwise be.
Here is a general list of our priorities: The features we are working on right now…
As for purchase, I would say you should base your decision on what is available right now, not what we might do. The 12 months of free features is a nice bonus, but I don’t think it is a good idea to gamble on features being introduced. Better to say “I need this feature now, and it is there, so I will purchase” or “There is no premium feature I really need, so I will wait”.