Perhaps, but it's important to keep in mind Marvel has their plans for the films and the series. Certain bigger name characters are reserved for the films, like Zola. Given Hydra's resurgence in TWS, it stands to reason they may have plans for Zola in Cap 3. Hence they probably want to keep him separate from the series for the time being. Besides, given the timeline of ep 16 and 17 occurring during TWS, and Zola apparently being blown up the day before the conclusion of TWS, it stands to reason it wouldn't have made much sense for him to pop up on the show as Clairvoyant. Now, since Widow uploaded the flash drive containing all SHIELD and Hydra's secrets at the end of TWS, my theory is Zola uploaded himself to the flash drive just before the bunker was destroyed, and was able to upload himself to the internet at the conclusion of TWS.
Besides, we've gotten a number of Marvel villains introduced on the series already, and that'll continue through the end of the season. Granted they're B and C-list villains, but that's logical since the A-list villains are reserved for the films. It's important to be realistic in viewing how they're doing the show in conjunction with the films. As it is we've got Fury appearing twice on the show's first season, Hill appearing twice, and a number of the SHIELD agents who appeared in the films and One Shots (Sitwell, Blake) also appearing. I think they've done a good job cementing the show in the films universe.