I suggest you put the number of starters in your signature - as you listed max games I'll take it as 2C/2L/2R/4D,2G correct? Plus when listing max games, it's clearer to mention how many games per slot, which is 82 games, rather than total per position as that tells us it's a full season.
Ok, so it's cumulative points so what do these players accumulate in total for the season/per game played? It's helpful to see the splits but I'm too lazy to do the calculations. Also, when looking at these totals it's important not to overvalue centres as you have FOW so it's logical they'll outproduce most wingers. It's about relative value to other players in the same position.
That being said, I'd be curious to see what production Seguin could likely get next season (more important as only keep 4) as a RW compared to Spezza as a C. Would Seguin be a fair bit higher than other 'replacement' RW than Spezza over 'replacement' C? That is the main question. Can you provide some past numbers (maybe use Seguin's 67 point season as an example, as that could be a fair projection for him, and add some FOW to boost the total). And use Spezza's recent production before last season to see how he would fare in total, and per game (since his value is more on a per game basis). Also to add that although it's cumulative and Spezza's perceived value is less due to missing games, you can consider who would replace him to give you a total for the season.