I am in support of small changes (and I have been advocating them for years now). Keep it small and eventually you will find the right values without breaking things.
The overnerf overbuf circle has going for far too long from Relic and I was actually unpleasantly supersized when it was continued when the community got involved in the patches.
I 100% agree that small nerfs and buffs are the way to go. Its a much better way to balance than hitting units with nerf bat and leaving them useless over long periods of time.
The biggest thing about small changes imo is that balance patches would have to be much more frequent.