I hope that I can convince you that I put a lot of thought in this suggestion.
I understand the danger of too much of a price drop, and that is why I stated that
some instead of all players should unretire. For an extreme case, I don't think unretiring a single player per season would affect the prices much right? I made the conditions for unretirement vague since I believe the BB's are the ones who are able to choose the best number of players to unretire to keep prices at a manageable level. Maybe some A-tier players can also be unretired.
Managing the number of unretired players will also help in maintaining the value of trained players. In this case, I would also like to include the usual suggestion that I see in the forums which is to increase the training speed. Even something like 0.1% (0,1%) per season will do since one you stop training, you will be behind a manager who trains with a faster training speed.
As one of the managers who was able to hoard assets before the inflation, I think that this idea benefits the whole of BB more than me. In general, I think suggestions do not benefit a single manager since they are applied to everyone.
Aside from this, lower prices gives more player movement. Acquiring new players give a better experience for me. I would like to see how they would perform, and it also gives me a better chance to compete.
Although recent rules (increased salary floor and boycott) are intended to promote competition, I think that it only forces some teams to be mediocre for a longer time. This makes the user experience poorer. Besides, I think users prefer it if something is given to them (better draft, increased training) rather than if something is taken from them (cheap players, income lost due to boycott). Like if the boycott rules were there since the game was created, there won't be that much reaction in the forums compared to now. This suggestion is aimed to give something to the players and with the right balance, would not negatively impact people.
To end, while I don't think that this suggestion is necessary, it would still improve the experience of the older users. It is just a little annoying that the longer I play the game, the more restricted it feels.
TLDR:1) does it benefit all of the community (or at the very least doesn't impact people in a negative way)
Yes. Price reduction can be managed by limiting the number of unretired players.
is it necessairy to tackle a current problem and can it achieve this without to many negative side effects
It is not necessary, but I believe it will give a better experience for older users.
Can it be done from an IT point of view (does tax the servers to much, isn't to complex to code, ...)
I don't know.