First.. I think Brighton is one of the more tactically flexible teams in the league. There's been lots of occasions when pretty much the entire playing style has been swapped for something else. For instance most times DW is playing, the team plays a lot more direct (which has both advantages and disadvantages). Sometimes the intention is clearly to play through the wings and other times the plan seems to be to combine centrally.
But ultimately there is not too much options to do the really wild stuff (like when BDB played almost as a left winger against Liverpool last season and they really struggled with just ignoring their pressure and make the game an aerial battle between BDB and TAA).
There is 18 outfield players (and this includes Evan Ferguson) in the squad with any PL experience. Some player types are missing, in some other roles there's no decent options. If Leandro Trossard has a bad day or if you want two Leandro Trossard on the pitch... too bad, there is no option. Want a strong target player up top? Doesnt exist. Welbeck is doing a good impression of it sometimes but he is better without the ball than with it. Ferguson is not ready and appears to be more of a poacher.
Want a pacy central defender to deal with counter attacks? One year ago there was three - BDB, White and Webster. None of them are available. Veltman, Duffy and Dunk are all good defenders, but slow ones. Trying Cucurella in the role has not been too succesful most of the times.
If you want to see Brighton be less predictable and more varied, you have to give GP/CH/Steve Bruce/your mum/whoever coaching more options. Dont need gigantic squad like (at times) last year but two-three players with a different set of abilities would change a lot.
I agree with most of your post.
However, even though in general I feel GP is doing a good job with the squad provided, he isn't when you look at attacking in the final third. It was brought up by Shearer on MOTD at the weekend but I've been banging on about this for ages.
Recruitment in these areas has obviously been poor but I would expect our attacking players to have progressed over the period of GP's tenure and I think we all know that it has not, in fact they have regressed.
It looks as though GP has been coaching the squad a certain way which has been bearing fruit but that attacking is neglected. Maybe GP has been thinking that the final third will look after itself.
Shooting has become ridiculous, the players have to take some personal responsibility for this. We all know it's possible to improve as a player with shooting, you only have to look at what Ronaldo has achieved with thousands of hours on the training ground and it is the same at all levels. Don't get me started on direct free kicks outside the box. When was the last time one of our players came even close to scoring.
Trossard is an example of this regression. He spends time with the Belgian squad over the summer, improves and is on fire for the beginning of the season and then what's happened? Is it a coaching problem?