Have been testing the new Synology app for ATV4 and the look and feel is great!
Folders, artwork, info, searches etc beats Infuse by far
BUT
no support for X.265/720p and DTS places it on the shelf for a while 
My old DS212 cannot do transcoding.
Was waiting for this for a long timeā¦ But absense of DTS(even as a paid option) makes it a no go for me.
Still using Plex server to connect to my Synology until next version of Infuse is out. I am still seeing stuttering when muxing subtitles into the stream on Infuse.
Drop me a PM if you want to give the beta a try. The few that were having issues with subtitles say itās been solved, but would be nice to get a few more thumbs up just to be sure. 
I have the Ds video as well but have noticed longer load times vs. Infuse pro. Also I like the ability to edit metadata on screen with Infuse.I would love to see a list view like Dsvideo has. Overall I think Infuse just does a better job.
I would love to see the beta version.
I have the DS415+ and it handles all formats (I have) very well; if stuttering occurs at some high-rate movies ( around 30Mbps), you can choose āMediumā video quality instead of āHighā, you wouldnāt notice the difference, but it eases the transcoding load significantly. The DS916+ is supposed to have hardware support for transcoding!
On a side note, did you notice the resemblance of Infuse and DS Video UI? Who was first?