There could be a few changes imo for some dutch players. I'm not sure but with your new db it feels you have been putting some work into the eredivisie because quite a few things have changed.
I think right now, several feyenoord players are too lowely rated in comparison with their direct rivals in ajax, and in general to their real life performances. Right now ajax is just way above all other teams in the eredivisie due to their players being quite a bit better, while if you go look at the table in real life everything is really close.
IMO following players may get an increase in ca, not much, but atleast to make it represent their real life performances more:
Jean-Paul Boetius (Feyenoord), pretty sure some time ago I already asked for this (not sure tho). Is with his 19 years already one of the better wingers in the eredivisie and one of the star players for feyenoord since his debute. So could use a pretty decent CA boost
Vilhena (Feyenoord), another youngster, Idd has been doing bad by the start of this season but has been picking up his old level. Only think that could be changed about this guy is his CA esspecially with his defensive stats, has been doing great for feyenoord as a CM also as a defensive player which is not represented right now.
Janmaat (Feyenoord) could also get a increase in ca/pa is one of the better RB's in the eredivisie and as far it goes, favorite for the RB role in the dutch national squad for the WC this year. Keeping van der Wiel (PSG) behind him.
Martins Indi (Feyenoord) How he originally started out as a CB he has been playing LB for quite some time now, and he is getting better and better at it, so could maybe get a small CA increase as a LB (esspecially his dribbling and crossing) while its getting better and better.
Shadrach (Twente) Though injury prone, really great player, has been performing good. Possible CA increase, not too much, not too low,
Ebecilio (Twente) Is after Klaassen/Schone/Clasie/Vilhena/Immers a great midfielder and a true box-to-box midfielder, same as shadrach ca increase would be on its place

.
Immers (Feyenoord) Could use a slight ca/pa increase, as he is already on his top level, but not represented right how important he is for feyenoord. Best true box-to-box midfielder in the eredivisie and we dont have many ^^.
Leerdam (Vitesse) Since he joined vitesse as a RB been playing really good, finishing some good corners through headers, normal CA boost would make it more realistic.
Atsu (Vitesse) Positional change to CM been playing there for Vitesse since he joined, doing great as a AP CM.
I think these changes will make the eredivisie as close as it is in real life, closing the gap between ajax/psv, and feyenoord/twente/vitesse, due to having their defense and midfield having improved to levels equal to ajax and psv and their real life performances.
Oh and I noticed 2 transfers not yet implemented (not sure if mentioned or not);
Warner Hahn (FC Dorderecht) --> Feyenoord, I dont know but he will join feyenoord summer 2014 if that can be implemented or not?
Loan Zakaria Labyad (Sporting (POR)) --> Vitesse.
Sorry for the wall of text :/