I can bet that even the PERFECT balance patch wouldn't get the userbase moving unless we make it forced someway.
Doesn't this tell you everything you need to know about it? If something is an improvement it will be used. If the balance patch is desired by a significant portion of the community that actually plays the game, it will gather momentum on it's own.
For example, the dota mod for WC3 amassed a vast userbase because many players enjoyed it and preferred it. Not because large sums of money were injected into it.