The list of players that have gotten a $6.5 AAV for more than 5 years coming out of their ELC is a short one. It's basically franchise players. Stamkos got 5/$37.5 coming off his ELC. Stamkos was coming off 95 and 91 points in his last two seasons, including a Rocket Richard trophy. Jonathan Toews and Patrick Kane signed for 5/$6.5 AAV. Toews opened his NHL career with point totals of 54, 69, 68 plus a 29 point 2010 playoff campaign when he led the Blackhawks to a Stanley Cup. Kane's ELC season had point totals of 72, 70 and 88, then a 28 point 2010 Cup run.
Those 3 are not comparables for Ryan Johansen. Johansen had 2 years of finding his way before breaking out in 2014-2014. The closest comparable I can come up with off the top of my head is Derek Stepan, and Stepan had a better overall body of work in his 3 ELC years than Johansen. Stepan's second contract was 2/$6.15 million.