One more thing - The cost for changing skill nodes is too much. The reason why it is too much - #1. the lack of a full c-bill refund, #2. wastes too much (premium/match time) to execute, #3. we're already limited to 91/237 active skill nodes. Now we have to burn c-bills and XP to simply activate a previously unlocked node. This is ridiculous!! Maybe execute a do-over and unlock all of the nodes on mastered mechs and reduce the cost to change to XP only. My c-bills are now for Mech purchases and other in-game items.