DaveMage said:One thing concerns me about the new MM. I have not checked out all the monsters, but I know one monster that *really* seems to have been altered just to fit better as a miniature: the wyvern.
It has a space/reach of 10'/5'. I did a double take when I saw that. In 1st & 2nd edition, these creatures were 35' long. In 3.0, they were 30' long. In 3.5, they are 15' long. Their wingspan was 50' in all previous editions. Suddenly in 3.5 their wingspan is 20'.
Can anyone think of any reason to do this besides the miniature angle?
Yes.
Oh, you want a reason?

Partly it distinguishes wyverns from dragons - certainly a 35' wyvern is bigger than most dragons that the party will encounter.
The size is also an important factor in determining the Challenge Rating of an encounter. Bigger creatures are tougher. A 35' big wyvern implies a challenge rating of greater than 6, I guess.
Consider the Challenge Ratings of a Blue Dragon:
Small - 3
Medium - 4 to 6
Large - 8 to 11
Huge - 14 to 19.
Apart from that, it allows Wyverns to be encountered indoors more often.
Cheers!