I think these are awesome changes.
First "the pick 10", that they increase choice, that you will be able to unlock stuff more freely, which also brings more varied soldiers on the battlefield.
And second, that they replace kill-streaks with score-streaks, which will hopefully improve team play immensly.
But, sadly for me personally COD is not my military shooter of choice. It's too fast and twitch based, especially when you play on console. Its weird to constantly witness that none of your kills and deaths seem to actually take place in real time due to the huge server lag, connection lag and console input lag
(I know that the server calculations are taking place more or less in real time, but I as a player am witnessing every moment with lag and even some moments that actually never happened because the server already counted me as dead before I shot those last bullets).
I hate that nagging feeling of being treated unfairly by the server whenever I get killed and the constant question of "would I have had shot first had my internet been faster?"
With slower games the online lag components aren't as apparent. So on consoles I think it's much more satisfying with a slower shooter like Battlefield.