1. Walcott has cleared away the cobwebs
Walcott has understandably looked a little rusty since his return from an injury that robbed him of a year of his career. But the England man is getting his match sharpness back and took his goal very well after 90 seconds.
2. Ozil is back in the fold
Another player who has spent a long time on the treatment table, Mesut Ozil marked his first start since September with a well taken goal. Ozil has never quite hit the heights expected of him since his big money move from Real Madrid, and will want to cement his place in the Arsenal side.
3. Arsenal will fancy their chances of retaining the FA Cup
Having gone so long without winning any silverware, could Arsene Wenger guide Arsenal to back-to-back FA Cups? The fall of Chelsea and Manchester City leaves Manchester United and Liverpool as Arsenal's main rivals for the FA Cup.
4. Brighton are on the rise under Hughton
Despite the defeat, there was honour in it given their troubles this season. Hughton has steadied the ship and has Brighton moving up the Championship table, which remains their priority. Hughton is an under-appreciated coach and there are signs he is already turning Brighton's season around.
5. The FA Cup is the gift that keeps on giving
Arsenal sneaked through in the end, but it wasn't without a struggle against lower league opposition, which has been a theme of this memorable weekend of giant-killing. The FA Cup may not be what it once was, but it still knows how to stir up the drama.
Bet on the FA Cup now.