He does have age and therefore time on his side. That being said, he appeared to have a tough time throughout his rookie season, often lunging at a single shoulder while in press instead of staying square, thereby allowing a clean release to the opposite side and essentially forcing himself to have to recover. His footwork was alarmingly unsettled, which didn't help with keeping up with the change of direction at the stem of the route.
Let's look the game against Tampa Bay mentioned above. Robinson was on the field for 28 snaps, a meager 10 of them on Evans. On their first encounter, lines up in press, tries to push Evans backwards solely through Evans' left half, an almost impossible task from a leverage standpoint, losing him in the process, engaging in chase mode, and losing him again for what could've been an easy first down for Jameis Winston (
Link1). On their next play, he doesn't lunge, but he does switch to a receiver stance, bringing back his left leg which willfully vacates the inside. He then holds Evans prior to the stem, wherein Evans follows by brushing him off and finding himself open for 12 yards (
Link2). To Robinson's credit, he covers Evans well during their next engagement in the end zone, being significantly more patient and settled (
Link3). He does a solid job staying with Evans on the following play but fails to turn his head (A common thread on tape), and allowing cushion on the comeback which is then overthrown (
Link4). This is exploited two plays later by Russell Shepard, who beats him cleanly on the press and stacks him, forcing Robinson to trail and then lose Shepard again on comeback, good for 13 yards (
Link5). Four plays later, he hesitates on the sell by Shepard, allowing an uncontested inside lane after the stutter, and surrendering his first TD of the afternoon (
Link6). Within that span, it should be noted that Robinson covered Evans generally well for a few snaps; however, he was then roasted on what should've been a 26 yard TD that is overthrown by Winston (
Link7). This was the second of two incompletions thrown in his direction. Three plays later, he's beaten on the press and is unable to recover despite the bump by Gerald Hodges, allowing an uncontested jump ball to Evans in the end zone (
Link8). He finished their saga with a 12 yard completion on the play after, holding Evans prior to the stem on the out route while never turning his head, with Evans easily shaking loose at the break point.
Statistically, he gave up 5 catches on 7 targets for 61 yards and 2 TDs without getting his hand on the ball once. And this was an afternoon that should've been even worse. I'd almost feel as if I'm nitpicking a single game of many, but this specific contest the game brought up as a banner example of a shutdown performer. In all honesty, it's difficult to fathom how this specific performance could be glamorized considering that by all accounts, not only was the technique notably sloppy all around, but if not for missed reads and overthrows, Robinson would've came away with allowing 3 uncontested TDs on the afternoon. Again, I do have to emphasize that this doesn't necessarily define his career or upside moving forward. But this was arguably a direct antitheses to an example of a sound performance, nevermind a shutdown CB.