I honestly think as long as they keep it basic and focus on creating good quality maps and a good variety of useable weapons so that it is literally gun on gun action, bringing it back to what CoD used to be, then the vast majority of people will be happy.
I am a heavy CoD player but I’m tired of this specialist nonsense with weapons and abilities that ruin the flow of the game. If I run into someone round the corner I want to Have a gun battle to determine the victor of the engagement, not have him leap 20ft in the air with his megadeath jackhammer of arsefuckery kill all team mates in the 6mile radius it covers.