Well, its hard to start this... but here I go. Petards are OP in long matches, civs without them are in really disadvantage, I suggest to replace them with grenadier or other similar unit because petards... yes, they annoy me because I cant do anything against a spam of french petards... Its subjetive I know, but really I am trying to be objetive and I remark, civs without them seems in disadvantage.
About historical coherency, correct me if wrong, but I never heard of suicidal bombers, I did a quick search in google and didnt find any answer so... grenadiers looks better and more actual for every civ.
And that's all, this is my first post so yes, I mainly created this account to give my "opinion" or suggestion or complaint xD, dont be harsh with me k I will try to do something useful for this community.
P.S.: If you want a video I can gladly tell my friend to play and so you can see how unstoppable are petards, I will try to use artillery ;-j