Hi Knight Otu mate! 
This is actually Upper_Krust posting from London.
Well I have made some changes to even V.3
Mmmm...I'll have a think.
I don't have a copy in front of me...I will later, but remember that Str - is now -2. So there are probably factors in the template not updated?
Sounds a bit pedantic, remember of course that the size bonuses also take ability scores into account.
Same response as to the incorporeal template above.
I'll return to this point when I have a copy of V.4 in front of me.

This is actually Upper_Krust posting from London.

Knight Otu said:After using the system a bit, I think there might be instances where you overrate the impact of some abilities.
Well I have made some changes to even V.3
Knight Otu said:Critical Hit immunity - while this is a broad category that prevents damage from several sources, I think it should not add more than 0.5 to CR, but due to it's broad application, it should add an additional 0.5 to ECL (basically splitting the +1 to CR in half). It is a powerful ability, but it is usually more advantageous for PCs than for monsters.
Mmmm...I'll have a think.
Knight Otu said:There seems to be an instance in the Incorporeal subtype that is overrated, but I could not identify it yet.
I don't have a copy in front of me...I will later, but remember that Str - is now -2. So there are probably factors in the template not updated?
Knight Otu said:Large and larger sizes might be slightly overrated. Maybe it could be advantageous to split it into the main benefits, Reach and Speed?
Sounds a bit pedantic, remember of course that the size bonuses also take ability scores into account.
Knight Otu said:I think you miscalculated the Ooze type.
Same response as to the incorporeal template above.
I'll return to this point when I have a copy of V.4 in front of me.