I agree that more could have been done to improve the game in quite a few aspects;
1. Monster AI - marines hiding in dark corners waiting for you to walk by is about as clever as it gets
2. Puzzles were designed for gamers with an IQ of a Sea Cucumber
3. Too easy on the PC
However, on X-box it does have some plus points;
1. It ain't that easy when using a controler
2. You get to play Doom & Doom 2 which for old gits like me is a real bonus. Now and again you want a bit of a basic, good old fashioned fragfest. Which apart for Serious Sam 1&2 is hard to find on a console