Yes this is an intentional move by the Dev's. There appears to be a split camp around at the moment with the Beta testers, those that love the new change and those that think it is too severe and is another limiting factor on how to play the game.

all tho i don`t see them as much as i use to i still see them more then it appears

you all do so i wonder if it is the way you are setting up your map ???

I don't mind the enhancements being less common - it makes them more of a bonus when they are not omnipresent. However, I think this first move was a bit of an overcompensation. It would be nice to see at least one enhancement per four systems or so.

I would not miss the 300% farm bonus!

But then, where would you get all of your cannon fodder for the imperialistic crusades which you will undoubtedly wage?

I disagree with the change- I miss the bonus tiles personally.

I agree with not having them on base planets though.

I myself am mixed towards the tile enhancements, or lack of, in this case. Originally I regarded diminished enhancements as a bad thing since personally I like to have those "specialized" worlds that actually are special for a given reason, not because I've built them up that way. Additionally I figured that by decreasing the bonus tiles, warfare would become even more necessary if you needed to procure much needed resources.
However, after reflecting a bit on the warfare part, I find myself wondering if reducing the available bonus tiles isn't a good thing after all. It would add some strategic depth, even if it is slight, regarding the conquering of planets. Thus, in the end, this would be a good thing for us in the "make war, not peace" crowd because it would add a bit more sense of purpose as we scroll over the galaxy looking for our next victim.
Hopefully the AI will recognize this and act/react accordingly. Hmmm...