Helis are unbeatable on Tsuru Reef. Map is legit unplayable w good pilots
Because Tsuru is so big, players are split, and it's unlikely multiple Engis can pressure the heli. A single Engineer will always lose a 1v1 with a scout or transport pilot who is any good at all. This is exacerbated becase...
Tsuru Reef is FAR too big for Laser Designation to function at all, they can just LoS the recon and play the other half of the map. This leaves only unguided rockets, which are generally trivial for a heli pilot to avoid when there is only one person launching them.
Tsuru Reef is unplayable if your opponent has good heli (Scout OR Transport) players. It is almost the sole deciding factor. Whichever teams has better helis wins. If one team knows how to make use of the transport, they win. If one team has a good Scout, they win. Because so many objectives are open on Tsuru, it is trivial for a pilot to totally lock-down all relevant objectives since the map flows so abysmally (objectives 200-300 meters apart, no safe routes to them from the helis.)
This is made even worse because the Scout heli spawn (E) is placed exceptionally poorly. It's super out of the way and has horrible flow to every other flag, so what SHOULD be a hotly contested point (as in Hammerhead of BF4 where the two central attack heli spawns are frequently the center of engagements) ends up being boring, bland, desolate, and a complete waste of time and resources EXCEPT to snipe the Little Bird spawn, after which the objective becomes worthless again. And since a good pilot will know the Little Bird spawn timer the best (since there is only one LB spawn so when they die they know when it comes back) it makes it EXTREMELY hard for the enemy team to consciously try to prevent it. Again, unlike Hammerhead where it's more likely more players know an attack heli was downed since the map is condensed and the attack helis spawn near the center of the map
You did not think this map through at all. To be frank, if I ever down a good pilot on this map, my immediate plan is to camp the Scout spawn, take it, and sit on our carrier in base. Realistically, my actual plan is to play better maps. 9 objectives is too many. This map flows poorly. Helis are not balanced in this game around maps of this size. Laser Designation doesn't work when players are so split and there is practically no cover from air on any relevant objectives. Boats are ineffective against air when there are huge amounts of cover from boats helis can take via the massive mountains and the map is so big. Maps like Golmud Railway at least have little aerial cover so laser designation/AT4s are better answers, and there's actual cover from helis on many flags, also mobile AAs that can take advantage of the little aerial cover. Tsuru has NONE of this. Golmud also has fewer objectives so players are more condensed = harder for a pilot to just circle one flag where there's maybe one guy shooting at them.