Ok where to start...
Line 1: we are not overstocked in midfield. We have regularly not had a proper bench this season and at one point we where relying on kallstrom to come in and do a job. We can definately fit at least one more midfield player. Most people want a defensive mid, but a deep lying mid in the Arteta/Gerrard mould would work as well, fabregas would do his phenomenally.
Line 2: I agree, fabregas can play anywhere along the front 6. Very versatile player. Just another reason why he'd be a good signing.
Line 3: I fail to see how us signing a world class player is somehow good for other clubs. Think your clutching at straws there. The other big boys would hate it if we signed fabregas. He's world class and would take any team in the prem up a level. As for scoring goals - your making the same stupid assumption that signing fabregas means signing no striker.
Line 4: fabregas would play basically every game at any club in the prem. total nonsense about only one club offering him that rofl. Wishful thinking on your behalf. He's good enough to displace any midfielder in the prem and get a first team spot. He would not be some rotated player being pushed out onto the wing at arsenal. He'd be played predominantly through the middle.
Personally I don't think any of your points are valid and if you think about it I reckon you'll agree