Add-on licensing model issues

I would love to utilise the Advanced AI add-on that Zendesk has released. However, it would only benefit 20-30% of our agents. There needs to be a way for businesses to purchase licenses/seats for add-ons without having to purchase them for every agent. With over 300 agents in our instance and only a small proportion of them who would benefit from the add-on it would be utterly prohibitive to purchase the AI add-on for our instance. The fact that you also cannot add the feature to a sandbox without cost and test it before purchasing is also a problem. Do other businesses have this issue?