Well, 're-balancing' units is an overstatement. Any work in that area will be offered as an alternative to the existing stats.
There will be, as mentioned, an update and a 'fixing' of some issues with the battlefield environment. 'Wraith of eternal doom' has taken it upon himself to fix some issues with tree models and sprites that were behaving badly in some instances, and he has taken the configuration of the geography database to another level, shall we say, by using unused ground types and adding textures to make battlefields look even better than before. From what I've seen, they look so good it's scary.
The total rework of ALL settlements and settlement types is a given, as I've been working on those for over a year. The idea here is simply to improve settlement game play in 'most' instances by using the better settlement models and in most cases the smaller ones. RTW originally 'expanded' cities by progressively making the settlement models bigger, and then putting huge (mostly) poorly designed building models in them to take up nearly 50% of the space. I have removed these huge buildings in almost all cases, and built cities in smaller city models with new 'living space' type buildings. This is a boon, because the smaller city models have better pathfinding.
There will be various 'bug fixes'.....I have a long list of them that need to be gone through....one big one being a fix for the Hoplites which I think I've found.
We could still call all this RS2.xx........I really don't care. It's just that with the new visual stuff, RS3 sounded better.
After the release of this, it is my intention to work on individual campaigns....tweaking, adding loyalty where desired, and maybe even creating new campaigns.
So don't worry.....I have no intention of messing too much with what took us years to accomplish. I want to 'improve'...not dismantle.