Suggested

DRS

Everyone seems to complain about a DRS train, the sort of thing where you get a string of cars all getting DRS, all playing follow my leader, apart from the leader of the train. 
My suggestion is that instead of DRS being linked to the Tech part of HQ which his a limited amount of variation, let's put it under the Design Points area of development. Putting in with things like Acceleration, Braking, Down force etc would mean a much more varied effect of DRS and so a DRS train is less likely to happen. 

Possibly, or at at least making it a little weaker. At level 15+ it doesn’t matter how far behind you are up to a second, if you get a drs you will pass the car in front (i.e. over a second per lap). This is too much and makes catching a drs from the car in front car to important to being competitive. 

I have no problem with DRS trains, or the respective 'power' of the DRS's.

In fact, in my strong opinion, I believe it greatly enhances the racing, with managers employing very advanced strategies around the DRS factor (keeps the high level, older managers more interested) whether to fuel 1 or 2 laps heavier, and/or to use as little KERS as possible to stay within the DRS.

A real test of skill, in my opinion. 

With a weaker DRS, cars would be spread out more during the races as overtaking would be harder. You would then get a new complaint, saying it is too hard to overtake, or Qualifying positions are too important for the races.

Putting DRS under Design is an interesting one. In real life, F1 teams don't actually improve their DRS that significantly, even from season to season. And another drawback would be, the first half of the season, with weaker DRS's, could be a bore-fest, as cars would find it harder to overtake, increasing the potential points gap from the top teams to the rest. Result could be that the top teams form an even larger points gap than currently, due to it being harder to overtake in the first half of the season.

All in all, if it isn't broken, don't fix it!

As a lower level manager in a high level League, I can find it annoying when I have a good position for the first 3 laps, only to get overtaken by everyone afterwards, even if I am using DRS myself. Perhaps make the gap between technology levels smaller, or even linking DRS to push levels?

DRS is linked to PL in my experience. 

You say that in real life F1, the teams DRS rarely changes but this game is nothing like real life F1. Boost works differently, it's far more of a spec series than F1 is and F1 doesn't have refueling. 

In our league we can have long DRS trains where only the car that's 2nd in the train can pass the 1st car, the rest just follow, hardly changing the gap nevermind overtaking. 
By putting DRS under Development Points we'd see a more varied level of DRS but it would still make it tactical but in a different way. Do you spend your points in early races on Acc or DRS or use them in other ways? 

@ sizie Q:

"By putting DRS under Development Points we'd see a more varied level of DRS but it would still make it tactical but in a different way. Do you spend your points in early races on Acc or DRS or use them in other ways?"

This won`t change anything on the standings or be a factor on any race results mainly bc stronger managers will adapt and continue to be just as strong especially if based on DP pts.  Right now the game is setup where only manager style/know-how are the difference making in a race. And you get there by taking notes on the many variables on each track. It takes time and effort but that`s where it`s at.  Or you can wing it and end up with a lot of inconsistent finishes.