Pokemon Heart Gold/Soul Silver were the perfect remakes that were both faithful and added the new seamlessly. Pokemon Alpha Sapphire/Omega Ruby did a hybrid of remaster/remake which worked in some areas but not all.

Pokemon Brilliant Diamond/Shining Pearl are ultimately bland remasters that keep the slow feeling of the original games even though they're not actually as slow. Nothing is better or different enough to be unique, and music was also very hit or miss unfortunately. Maybe nostalgia was blinding parts of game but I've come to the conclusion that Pokemon Platinum has the best of SInnoh and not Diamond/Pearl and these remasters suffer for that.