The short kick out is going nowhere.
Teams will want the front 3 to put on a bit of a press, but everyone else will pull back into a defensive shape. The same logic from before still applies, the risk of conceding off a long kick out is far too high, so unless you're likely to win the midfield battle or the game situation forces you to take that risk, you'll choose to avoid it where possible. The front 3 can drop right back to near the half way line remember, not too different to what teams did before. That's probably close enough to fight for a break ball.
An opposition kickout is still a defensive play. You're living in cuckoo-land if you think any manager will simply allow an opposition to repeatedly lump it over half their team and easily attack an exposed full back line.
Ideally you'd let the opposition take a short kickout, progress the ball slowly up the field and bring 12 attackers + goalkeeper into your half, then you'd win the ball off them and hit them on the counter. The main difference from when that happened before, is that teams will have a much stronger counter attacking threat because of the 3 up front, so hopefully fewer of those transitions evolve into slow phases of play and we see more shots.
I think to counter this, we'll see a 4th defender stay back and hold a 4v3 in the defensive half of the team with the ball. That would both act as cover if the team in possession lose the ball and can also be an out-ball to safely keep possession. That'll force the team without the ball to decide whether to push a man right out on him and leave space closer to their goal, or let them keep the ball out the field.
Re rafferty - he's the ideal man for this. He's been recovered from injury for a long time now and is much more athletic than any other goalkeeper like morgan or beggan who will try to play the same role. Other teams will be experimenting with an outfielder, and we have one ready to go who's already experienced some huge pressure moments as a goalkeeper. It would be crazy not to play him. He starts for almost every other team in the country.
Our strategy of using the bench and holding players back until the final phase of a game, seemed like it was going to become more popular anyway, as teams generally copy what wins. The combination of an increased potential to score (giving more reward to the risk of holding players back until the game opens up) and the chatter about high speed running meaning players will fatigue quicker, will only make that in-game management even more important. That should be an advantage to us as we have a massive panel with a lot of very athletic players, and we've already been deploying the strategy to see who does well from the start vs the end.
I also think the idea that man-marking is a lost art and corner forwards are going to have a field day in the 3v3 is a bit misguided. We could end up surprised to see how often defenders are able to manage their forward into a situation where they can't get a shot off despite the amount of space there is.