Let's actually look at these players in a bit more detail and context based on our last promotion season.
Fotheringham - Never really been amazing, and would say he's as good as Davies
Bash - Getting on, bit part player in the last promotion season
Baldock - Played 36 games 1 goal 3 assists - not groundbreaking for a RWB in the system we played - then spent the following season injured for almost all of it..
Egan - This one will certainly need to be replaced, not only a leader but a real first team on the sheet player at the back - however went and spent the entire season after this one injured
Lowe - Played 26 games (injured for the rest) in the last promotion season 1 goal 5 assists - again not groundbreaking in the system we played (Burrows probably a step up already here)
Bogle - Funnily enough, played only 20 times one because of injury and 2 because Baldock was ahead of him - I think this one shouldn't be too hard to replace either
Norwood - Played 44 games but from my memory, people wanted him out of the team for Doyle - when Doyle did come in we had an upturn in form - getting on don't think this will be too hard to replace.
Fleck - 26 games, but very much a squad player and getting on abit. Best days about 4 years ago? Well behind him
McBurnie - 38 games - 13 goals - hard to replace? Probably not, we have a player (Moore) who can probably get those numbers this season
Ndaiye - Biggest void to fill, but genuinely believe O'Hare could be better than N'Diaye was this season
Berge - Hit and miss, 37 games played 6 goals 5 assists and I believe Hamer will output more than that this season
Sharp - As good as Sharp has been, his decline has been rapid over the last year
Stevens - Left us a while ago
Osborn - Mainly a sub to come on at the end of games as a midfielder (??) - or filling in for injuries...
Jebbison - Played next to no first team games for us, scoring only one competitive game almost 5 years ago...
Mcatee - Ok, excellent in our promotion season, but I think we could get a similar type of loan this window from a Man City/Man U/Liverpool
Doyle - As above - fully expect us to get this type of loan, too.
So taking everything into account, are we really that much weaker without the 17 above?
I don't think so...