@cornelius_blackfoot Your iPhone 4 has a retina screen, does it not? That's 326 dots per inch. Of course it looks fine on that. It looks fabulous on that kind of resolution. On the 132 of an iPad 2 it's not so nice.
On the subject of my motives, I'd ask how many people have said "I love the new font; it's so readable" compared with those who have said the opposite? Maybe we should run a poll. Can we do that yet?
I have no insecure need to be proved right. However I do have an amount of experience, insight and wisdom gained over 16 years of commercial front-end development, and I am sharing that. If +Velocio chooses not to change it that's up to him, but I think that changing it will make this a better product.
In any case, for Microcosm to be a successful platform future forum owners will probably expect to have control over the styling of their forums.