No bad. But it still opens a lot of headeaches.
Do they need a UK job to reside in the UK? Minimum income (which would almost certainly exclude workers in agriculture) and/or savings?
What benefits would EU citizens in the UK be entitled to. NHS? Child benefit? Pregnancy grant? Unemployment? State pension (of course, after paying NI contrib)?
Perhaps you don't know but as of now, EU citizens in the UK are entitled to pregnancy grant and child benefit, whereas citizens from non-EU contries are not (no, they don't get a discount when it comes to pay taxes).
What fees for Universities? RIght now French undergrads in UK universities pay the same fees as their English mates, 10k/yr or whatever. But students from outside the EU are asked much higher fees.
Undergrad students in universities here in Germany pay all the same fees no matter what country they comes from, few 100s/yr.