The downside is that at higher relics it isn't actually easier.
Quality of life is important, and I want to see a way to achieve that. one way to do that is to increase the difficulty of achieving max score as you go up difficulty tiers from 0-3, then decrease the difficulty as you go above Tier 4. Or just make Omis available that allow for auto'ing more teams. There has to be some way for a person to spend their way out of having the raid be a pain in the burro.
I think this raid is less popular than others, but even if it isn't every raid should be set up this way b/c you can't skip it without hurting others. With TW or GAC you can skip and only hurt yourself, but skipping the raid penalizes people who aren't you. This can create good motivations ("I want to help my guild mates! Let's win this together!") but also negative pressure ("I need to do X in real life, but my guild suffers unless I max out my score, which is going to take multiple restarts and 90 minutes").
Being able to buy your way into an easy raid through Omis or high relics is a way that you can do both -- help your guild win AND have a life where you get things done.
Sure, not everyone will be able to afford the relics or omis, but at least it would be an option.