Dale - I have an EV here and for voice overs, it's simply streets ahead of the AKG.
o be honest thjis microphone is becoming the holy grail of youtube/twitch videos, MKBHD always uses a sennhe as do alot of top tier youtubers, I personally just want the microphone because I like its natural sound, not to much bass or untrue sound of my voice (i feel like other microphones add this) and most importantly its out of shot i dont want a pop filter and mic taking up 20 to 30% of the screen and compared to the rode ntg2 it doesnt need the gain cranked all the way to 8 when not that far away to pick me up okay ish i can keep it at around 5
It is the Holy Grail of people who have no idea what a good mic sounds like. You cannot draw conclusions without comparison. If you buy one, and like the sound - that's fine, but it does not make it remotely the best in quality, or the best in value. It is a shotgun mic. It is designed to work at a distance, and be very narrow in acceptance angle. All the things voice overs don't want. If you want good quality without being seen, then an omni miniature clipped on is better. Shotguns are problem solvers, and many people have tried to use them for all sorts of things they are not meant for, by design - and until they realise they wasted their money, they're happy. So many people on youtube have totally awful audio, that a 416 might sound good by comparison - but off-axis they are thin and weedy.
You're happy, so that's fine and dandy. PS - the bass thing is a feature of cardioid mics used close. Only a very few have designs that reduce this. If you need to pickup sound from a further distance, then you have little choice but pick up room sound. Perhaps you even like it. Youtube is not broadcast, and bad habits from people unskilled in audio are very common. If you watch broadcast TV, it's very rare to see 416 length mics being used in vision. The reason is easy - they're simply not very good at it, because a lav mic is nicer sounding. Even your President uses a iog standard cardioid mic, even though it's ugly. If a 416 worked better, I guess they'd give him one, but they don't.
Lovely microphone, just horrible for indoor use.
As for the quality of the mixer and or interface? I think that the Yamaha will probably do the job for you fine - and any small differences between it and a separate interface will be too small, especially with the mic compromise you have.
If you are happy with it, that's all that matters. Your voice and your channel.