The new tournament format gobbles up troops, there is no doubt about that. So troop replacement during the tournament becomes paramount where as before, you could plan your troop builds, run the tournament and recoup your troops after the tournament. But the cost of troop replacement has tripled, because when Inno made the training centers independent from each other, instead of paying for 5 slots at time, it is now 15 (how many of you idle a slot or two, or simply reduce the number of troops being trained in each slot with the slider?)
In short, I'm running out of supplies (where as before these changes, I never did): the demand for supplies has increased dramatically without a way to adequately compensate for their loss. There is a lot of room rebalancing & many options to consider, but imho, either lower the cost of training troops or increase the ways to create more supplies.