The original font size was fine with me. I see a little experimentation is going on, as briefly there was an even smaller font size than the original.
The original font size was just fine. The current one is too big.
But I do like bringing threads with new posts to the top of the page. Previously, it was not worth responding to a thread way down the page, or off the first page. No one would know about it, but if it is brought to the top of the page, then we can all see it clearly.