Thanks for the detailed report
game was painful to watch, teams rather happy with a draw except maybe the end (after 80') when lazio really attacked.
OMarseille uses 4231 or 433 with payet as acm, guendouzi more b2b and kamara doing cdm.
its a bit sad because kamara moves rather like baka on the pitch where he covers positions of other players going forward (not sure if this is how he prefers to play or coach call).
imo he should leave OM and try other team where would be a place for him to move a bit forward - like in milan we have kessie/benna/tona often pressing pretty high - because he has skills to be modern all around cm (even when used as cdm).
as a player he is pretty fast, has good technique, vision and decision making, lacking (if compare to kessie) some stamina (but still young) and body strength.
his positioning sometimes is questionable for me also.
played last season a lot and same happen this season, but for me he is not ready to be a starter for good team in ucl - maybe he will be in the summer.
sunday there is OM vs psg, probably worth to watch because there should be more 1on1 and skills demanding situations.
for me now he is talented player that is not used in the way like modern/attacking/top football is played this days (where quality is expected from cdm/cm to do things all around on the pitch)
but in total i saw him like 100-120 minutes this season in 3 different games so ...