first of all, sorry for my bad English.
Than... until now I've the impression that we can run a marathon and than aim a target without accuracy's difference with "campers".
It wouldn't be more realistic that, after a run, we have a worst accuracy?(especially at long ranges and with all weapons... -> that's can be an other points... to much 'fixed' aim without difference between close or long range <-)
We need to recover breath, without this our chest continue to move and so we have less accuracy.
So, we can have a more tactical game (always IMHO), littlest runs, take cover, control perimeter (or, one cover, the other one run... the 1st one take cover, take back breath and he give cover at the second one)