I think your alt marks are fine - more might be too confusing.
For me when I look at the depth charts which I think are very valuable for certain leagues, I find myself wondering which guys you think have NHL potential - now I know I can flip over to your top 100 list to get a better read on prospects but perhaps this list could have some kind of upside indicator from you.
Yahoo weekly starts 12 team league, keep 17 plus farm
GS, W, L, SV, GAA, SV%, SO G, A, P, +/-, PIM, SOG, GWG, PPP, SHP, HITS, FOW
3C: H. Sedin,Stepan, Stastny, R. Johansen, Hanzal, Anisimov,
3LW: Burrows, Vanek, Ott, Lupul, Dubinsky
3RW: Doan, Pavelski, Brown, Okposo,
6D: Franson, Doughty, Voynov, Subban, Markov, Gonchar, Karlsson
2G: Price, Emery
Farm: (< 100 games): S. Elliott, J. Bernier, Galchenyuk, Etem, Eakin, Atkinson