What a joke, I sure am not going trough that grind again, not to mention fighting uptier again.
If you want to promote playing lower tier ships try giving the research points on those ships for each battle.
Bigger radar ranges and longer durations, that 6 seconds delay is nog going to cut it.
How about line of sight blocking and/or ghosting the radared ship in a 3 second delay for allies not using their radar.
I would even go as far as only showing radar on the minimap.