I can write just 1 proposition or many of them.
In short way (no matter what limits on plane tiers will be - we saw it in past and we will continue to see this rule broken by some of players).
Of cource I don't need the T4 scouts, whatever u say the rule will be for BOTH teams, for me the big problem is THE LAW.
We will not start to cry during the game - WE DEMAND GAME STOPPED, "look there is AGAIN an poor T4 scout flying near T1 and T2 ones, at the right, no-on the left, again on the right..."
Noone needs that kind of victories to determine who's the best.
The problem with scouts is that 90% from the players&refs will have no time to spot, (and be 100% sure on their decision), in real fight the T4 scouts to give REAL and fair penalty during the match, especially the RM/SN/MN ones. The cries can start after the game. (depends of it's score). The winners will "pass-by" if oponents was cheating, the losers will desperately ask for analysing and give the victory to them because the rules was broken (NO REMATCH).
That's all the lyrics but it is the truth.
When an single flying T5 scout can be easy spotted by it's speed, they are also seen in first place by players and only after their screams in chat - by the refs (some of them :)).
Assuming that some one will bring T4s.
T1,2,3,4 from 7 nati.ons = 29 types of scouts (IJN have 2 kind of T3 tier scouts), on 2Dmap the difference between them is small pixels or colour wich can be spotted at most of the time ONLY on full zooming. We have 22 players in team, 20 of them by default can use any kind of scouts. The refs will have to watch at the planes all the time instead of another (much important) parts of their JOB.
(The rule - Tier 3 max) doesn't mean that all flying small pixels will be T3s, it can be T2 or T1 aswell (for example T1 scout at least have less load space and when meeting with fighters they are falling in the exactly same way - "enemy plane in sight - mayday mayday"). Even the T5 scouts are food vs controlled T3 fighters, by their speed-no, but in fact-yes).
- good luck with analysing tonns of screenshots after each played match (round) because i know that THIS RULE for planes will be deffinetly "forgoten" by some players. Their kind are entering in the Mod organised rooms and all the times trying to sneak their 8" guns in room with 6" max (for example) - and the best part is that they are almost never spotted&penalised, even those with small BB guns (11"+) can be seen only after the game starts :).