While I agree that there are flaws doing it I think it's a valid method. So many other things have changed - the ball, the offside rules, level of fouling allowed etc. - that it's often a nonsense to compare each era anyway, but people do so why not when it works in MCFC's favour. Dixie Dean only scored the volume of goals he did in his record breaking season because the offside law had changed (similarly with Tommy Johnson at City), so it's so difficult to pick greatest players, games, teams etc. but they still do. Personally, I'd produce as many stats on this season as possible and let football decide what is significant and what is not. The idea of 'The Record Breakers' forever meaning MCFC 2017-18 has a great appeal and I think we should blitz this as much as possible. Others would, so why not?
I interviewed Malcolm Allison 26 years ago and he said that Joe Mercer had told him to celebrate your successes as if they are your first or your last that way you'll never be disappointed. I'd add that we should boast of what our club has achieved - by the end of the summer there is a strong chance that MUFC, LFC and maybe AFC have won a trophy - they will do all they can to claim these as major triumphs so we need to ensure our triumphs continue to be recognised above all else.
I agree with your general sentiment, but I'm still not sure that the comparisons are valid. If all of Dixie Deans' goals had been televised then it would be possible to analyse them and work out how many would have been disallowed for barging the keeper if the current laws applied. That might mean that his record would no longer stand. But that would be meaningless since obviously if he had played under the current laws he would have adapted his style. It would be pure guesswork as to how many goals he would have scored under today's laws. I think its equally misleading to recast points accumulated under two points for a win on the assumption that three points had always applied. I'm almost sure that none of the previous champions would have matched City's achievement (if we break the 100 point barrier) if 3 points for a win had always applied, but you cant say so with certainty.