I'll say it's as good as it can get. Fee estimation utilises the mempool's recent fee statistics to guesstimate the suitable fee for you. Unfortunately, this entails having the downside of the software to not be able to predict future fees.

When I pay lower fees, I find it better to assume the worst case scenario since it's more likely for the mempool to spike suddenly (like what just happened) within the timeframe. There's no model to predict the fee market and that's the best estimate that can be given. If the algorithm were to be more forgiving, people would complain that they're paying more than required for most of their transactions.