Thanks for your feedback , much appreciated!
Ok, you're not the first person to suggest this so I might have got this one wrong! New plan (that I haven't thought through at all... and am not gonna change in the doc for obvious reasons)! Could probably do with wargaming a few scenarios but OTTOMH...
No Objectives Disappear, Objectives are not sticky and still need to be seized at the end of each round (risking DT), also...
End of Turn 1: Losing player chooses 1 objective to be Lv2
End of Turn 2: Losing player chooses 1 Objective to be Lv3
End of Turn 3: Central Objective becomes Lv5
Then we get it down to four turns as well.
Thanks for your feedback though, its really helpful.