I think it would be nice to have the tapatalk option. It doesn't take anything away from the current site, does it? The user can then choose how they want to interact with the content. The benefit is for people like me who use their phones at bed time; thus, the dark mode in tapatalk is quite pleasing to the eye. Likewise, it allows me to browse watchuseek and calibre11 together.
Regardless it's your call. I would urge tapatalk, especially since I think it's an addition rather than a replacement.