Intensity is true but the game does not speed up in the playoffs, it slows down considerably. Being able to create in tight spaces becomes so important and thats actually something he does very, very, very well. Colorado and the Oilers last year are the only teams that play a high octane system that have made the finals in the last decade (MacK and McDavid also help, ha) but slower, more methodical teams that find a way to create offense through pressure are the ones that normally win (your Florida/Vegas/Tampa x2/ St Louis, etc.)
This doesn't mean that he will be able to continue to do this at the NHL level off the jump or that its even a good idea (I'd rather not waste the ELC year, especially given what this roster is and their need for help in other areas to be a serious contender) but I wouldn't write him off just because he isn't a burner.