Sort of. It more or less means that the combination of the coach's skill (both in terms of on-the-field play, and off-the-field team development decisions) and the roster's inherent strength benefit (ie, Chaos Dwarf is inherently better than, say, Goblins) equates to around 450 TV of value added to the team. Remember that anyone they face will have the same additional value (or.. subtracted if they happen to be a bad coach playing ogres, say) from their team's general TV value.So if a coach is good their team might stabilise at say +5. At n = 90 that is -450tv. They will get to -45O eventually whatever n is it is just a matter of time.
You probably don't understand the physics behind air travel or even the engineering behind modern automotive technology, but I'm guessing you don't walk everywhere. Sometimes people just need to say "I'm not willing to learn how this thing works, but I trust that it does because people I know understand it say so" or they need to take the time to understand it. There is never a justification for saying "I don't understand it, and am not willing to learn, so it simply shouldn't be".Ok, that is not 'why'. But zSum is much more intuitive and easy to do method than TV++. I think that the benefits of this TV++ MM & inducements system will not match the suspicion it will receive.
Though zSum will be strong and fair enough compared to the TV 'alone' MM system we have right now.
In this case, zSum is weaker than TVPlus and TVPlus is pretty damned intuitive - its a very simple calculation! You also need to use a self-limiting rating for matching, and in your suggestion that isn't happening. zSum is wins - losses... but someone's zSum doesn't get used for inducements.. The best and the worst coaches will simply "fall off the edges" of your system, as they'll just keep winning or losing until their zSum is totally meaningless and so far from anyone that they'll never be matched with anyone. In a TVPlus system that uses TVPlus rating for inducements, the rating is self-limiting... each time your rating adjusts up or down, the difficulty of continuing to progress in that direction is increased. If you lose match after match, it gets harder and harder to lose (unless, y'know, you're trying to lose I guess).... if you win match after match it gets harder to win.