Yes and Yes.
While I initally thought there was some adjustment of the bot's spotting of infantry in 1.2.9, it seems that was just a lucky game. In subsequent ones, the bots are still spotting infantry at long range. I try to use the jets very carefully, but I thought it was just over 1/2 that caused the signature and not almost 1/2 of their power, so that might be it too. Maybe that needs to be adjusted just a little. Almost 1/2 of the jet power just gets you going usually. Some kind of indicator on the jet power bar that illuminates when your "hot" and emitting an anti-matter signature, would be a great addition.
The next time I get a chance to play, I will try to make a movie demonstrating the bot spotting.
In my opinion, enemy Hermes and Bacchus seem to have even more super spotting capabilities against infantry.
And hey, good to hear from you Clay! Don't be a stranger. Please keep up the updates, they are fantastic, still enjoying this game alot.