Another point is... say you have made a classic team.. you just want more options in pes.. for example classic benfica. Now I don't know them very well..so I don't have a grand knowledge of them.. or their players. But I may like to have a team of them with rui costa/di maria etc, but as I don't know who esle played for them.. I wouldn't really know who to put on them. But if there was a list of players in a thread.. I could see a favourite player of mine played for them at some point, say for example Miccoli. So then I would easily see an option for a new player on my classic Benfica team.
I think this would be really usefull to people. Rather than looking in an allstar team and seeing teams with only a few players you recognize, you'd know recognize many, and have a plethora of options for your team.
Not to mention there are tones of great contemporay players, as well as many players who never made it into an allstar team.. who are basically all but forgotten. This would be a great way for peoples works for players to be put into more use, and get more exposure... which could also lead to more people questioning the stats, and getting a discussion going on the player, and possibly a more realistic update.
This wouldnt be an era team or a allstar team, but just a collection of semi significant players.