Decent players dodge RGs all day, sometimes during a hectic fight the animation and noises can get lost, but besides that other nades do similar damage from what I've seen.
If a Gren squad is at long to mid range you should be keeping an eye out for an RG, no excuses.
Just like if a Con squad or any other squad is close range you watch for molotovs or other nades, this is basic stuff.
Decent players wipe squads with RG grenades all days, You don't? maybe because you're not that decent.
Argumentation based on Decent players do or not do it is completly bullshit imo.
During a hectic fight, if you're not already microing the squad targeted, when you heard "Grenade", it is already too late. Time to select the squad and click aways to move it to short to dodge it.
Microing two squads, if you can determine what squad is going to be targeted and you probably be able to move it in time.
Microing three or more squads vs a equal force
-1 You don't have all that time to pay attention to that a little model on his knee
-2 if the grenadier squad is in range of your 3 squads, you don't really know which one is targeted.
So the only real option is to hit retreat button, which makes that grenade a bit overpowered for its cost.
Two possibilities to make it more visible if we don't want to decrease his damage power.
- A countdown at the moment the model is on his knee - red as any other so you are prepared
- "Grenade" to be called a the moment the model is on his knee - so you have more time to move your squads.
same mechanics as for any other grenades in the game.