Roland: over the summer we'll look into such issues. I understand your point about overly long history but not set for deleting content because of their age, thus that is unlikely to be implemented as such. However, we already are considering a kind of 'archiving' posts so they are removed from the overviews, but still are searchable.
(on a tangential note, slightly funny to discuss the above for a site less than 1 month old
glad you have high hopes for the future ...)
As to *PM* the system is pretty basic at present and clearly should be improved. Again, this will happen when we manage to do so. It's already on the TODO list.
*Like* buttons are not on the TODO list and with the current NG Team, never will.
Lew: the subscription will be looked into.