Sorry, I should say the same service that was promised on Friday. I don't actually get the train for week day games (and never from Lewes), so I can't comment on the realities of what happened, only the service level SASTA promise.
They've gone for a blanket "Trains every 10 minutes between 5pm and 10pm" without actually looking at times. They need every 10 minutes between 5pm and 8pm, then the same again from 9.30pm and 11.30pm. That's the same number of hours of peak service delivered, but spread more evenly. However, I...
Looks like 15 trains from Brighton between 5pm and the last one that'll get you there for kickoff. Couple of spots where it's 15/20 minutes between trains, but plenty of capacity overall.
Coming back, there's 4 trains between 9.15 and 9.45, nothing till 10.15 and then 5 trains from 10.15 till...
It's not on the National Rail journey planner yet, but Southern Rails Twitter account says there are trains from Brighton to Falmer at 10 minute intervals, so you should be ok.
No, but it's on Southern's Twitter, and it take a little while to come through on the planner. Southern's current statement is trains every 10 minutes between 5pm and 10pm.
There is free WiFi at the Amex provided by The Cloud. It's generally pretty reliable in my experience, but by no means perfect. It can still get overwhelmed, which pretty much any system trying to cope with 20,000 odd people will.