since this was an error on your part, let's assume that this part is fine as it's never changed and always been 50%
I haven't noticed anything different with my barch attacks. Other than the 4th mortar and the change to the archer towers rate of fire. That made a huge difference in barch. But to be honest the increase in hitpoints I barely notice.
as for the cannons, i wouldn't be too worried, the majority of bases i raid (Crystal 2 to masters 3) seem to have level 11 cannons and instead opt for archer towers, xbows, or inferno tower upgrades. I bet it's a while before you see widespread use of level 13 cannons.




