no i dont know what delayed crews are could you or someone explain thats kinda why i posted this...

ppl like eufonioum, should leave the forums your asking for info and he doesnt have any but still shoots his mouth im tired of it, no respect. 

good luck bro, im curious on who has delay classed and how their saliors turned out also. bump.

Eufonioum your a punk you tried to degrade him and thought it was clever, your not. Your insecure about your intellegence and whatever else just like many of PC gamers.  im done with this dumb internet fued.  Dont disrespect people.  We want info not two cents.  If you cant answer dont post move on.  We want Info not some insecure snobs. Done.

I guess you are a new player here so welcome.

What you need to do is class them on time. there is no point for you to start messing around your crew and try to delay class them as it might turn to a boumerang for you and end up with sailors that are useless.

As you said their other abilities will drop. Thats why you have specialised sailors in their respective jobs. First repairers (you need around 3 of those) are enough to repair your ship fast . The increase in the repair ability it will help them to repairer faster.

Same with engs (around 5) they will help with your speed and overheat.

Restorers are generaly useless on bbs. So avoid them.

Hope this helps.

For trying to outsmart the classing.

You should have at least:
Basic Mathematic 
Differential equation
Wasting time at trying and error just to make sure your math is not a failure.
Rolling GOOD crew and not some random one. (that means rolled sailors that outperform even Ellites!!! like 11/11/11 supprt 11/12 12/11 ,etc.)

But yea, class on time. Don't bother delaying crew. 

Edited.

I've seen some people play with their engineers but there is no benefit to doing it with repairers because the only useable stat lost is restore.  Keep in mind that crew growth also increases with classing.

And slasher, I'm with Eufo, you're the one being a hypocrite.