-Very difficult to tell what our "system" is or has been because we don't play that much international football, the majority of our local footballers aren't really professional by the highest standards of today's game, and the majority of our coaches either don't get a real opportunity to do their jobs or don't appear to have the experience or credentials necessary for the job at the highest level.
T&T either plays against weak Caribbean/regional opposition where the football lacks structure, rhythm, organization & a clearly identifiable pattern so much so that natural talent, experience, and creative improvisation end up being way more evident than a particular system being employed.....
or we play against Teams like the U.S. or Mexico where (apart from a few exceptions), for long parts of the game, we seem to be punching above our weight and pretty much executing an exercise in damage control and picking our spots when the occasional gap opens up.....as opposed to impressing a style on the game, and showcasing a particular system or football philosophy.
Despite that, differences between the Gally era, the Porterfield era & the Beenie stint can be seen. Apart from the Gally era where our football appeared to be tactically naive, somewhat basic & ultimately the most expressive and entertaining, the ideology of the coaches appeared to be more correctional in an attempt to mitigate as much as possible our glaring deficiencies (defensive disorganization, sub par technical ability in various areas of the pitch & a general lack of mental toughness/concentration) as opposed to be one where a pure system or style was being implemented. Add to that the fact that none of those coaches really got a chance to spend enough time with our teams to really shape our game as they probably would have liked to....
I think that until the technical development of our players is sufficient to compete at the highest level in all positions of the field, and until we establish some stability and continuity in the coaching dept. at the various levels it'll be very tough to define any kinda pure system, style or brand that is identifiable across levels and generations of T&T football......
