They could add +5 to current red max level and scale appropriately. Like right now everything ends up to 50% less (cooldowns, abilities, etc.) Just factor that in. Keep it at 50% and just keep the need for max to stay at the 50% cap scaling it to +5 everytime they want to gear increase.
This wouldn’t be a band-aid but a full-featured fix to future gearing concerns.
I spent a couple weeks thinking about “future gearing” for SWL and I honestly think this would be the best approach going further.
EDIT: Keep in mind too that the +5 red could be a great anima shard consumer in the process.