Bluewallet has been the best bitcoin mobile wallet, then followed by Electrum. It has almost all the features that a good bitcoin mobile wallet should have.
Agree with you that BlueWallet's simplicity is one of its biggest strengths. That's why I think BlueWallet's specialty is not only being beginner-friendly, but also providing a great service to experienced users, in addition to being easy for all users.
On Bluewallet, you can now pay with less than 1 sat/vbyye if the mempool is not congested. The wallet open faster than before. These are the two that come to my mind, but there has always been improvements.
Transactions are completed within a shorter time than before and have become friendly for users.
As a mobile wallet, BlueWallet is simply one of the best bitcoin only wallet with features that were only available to desktop wallets, from having multisig, to PSBT support which makes it easily compatible to some hardware wallets and all other bitcoin network features.
The matter of multisig is also important here because instead of depending on a single key or single device, multiple keys can be kept in separate devices or locations. As a result, the security model changes a lot in the case of large amounts of Bitcoin. From this point of view, seeing BlueWallet only as a mobile wallet may not fully represent its current capability.