mobile

Hey everyone, just wanted to run this by you guys to get an opinion and possibly some insight as to a few features that seem to be missing on the S6.

First off I have owned every Galaxy S device, from the old Vibrant to my current S6, also had a Note 3 and the beast phone Note 4 which my S6 replaced.
I received my S6 on April 2nd and have messed with it a lot to try and learn the ins and outs of it.
Now to the issue at hand, I do quite a lot of picture and video taking, the first thing I noticed is there is no "capture" feature in the video viewer settings which allow me to go frame by frame and snap a photo within the video, its an awesome feature and is very useful when wanting to capture a perfect shot you couldnt really capture with the camera shutter.
Second thing I just stumbled upon a few minutes ago, I took a 0:54 video in 4K but wanted to trim just the first and last few seconds . The trim editing tool took entirely waayyy too long (abour 3 minutes) after pressing export and not only that but it did not allow me to retain the 4K resolution, highest I could choose was 1080p.
I still have my Note 4 and tested it out just to see if maybe I was just overreacting.
Turns out the Note 4 will trim the exact same video and retain 4K resolution in no joke, 7 seconds. Any idea why?

Am I missing something here? Also anyone find the "capture" feature when viewing a video?
Can the Note4 video trimmer be ported into the S6? Perhaps it will be fixed as the device is technically not even out yet so I may be a first to notice.