The phrase "perhaps more pertinent" is correct and can be used in written English.
You can use it when you want to emphasize that a certain point is of particular relevance. For example, "The most important factor is the cost, but perhaps more pertinent is the timeline associated with the project."
Or perhaps more pertinent: why?
But perhaps more pertinent are those who ignore the reality of the present.
Perhaps more pertinent, the third anniversary of the defeat at Leicester that brought his second exit from Chelsea comes a week on Friday.
Perhaps more pertinent is the charge that Aborigines are losing their identity and sense of purpose and need to take back control of their communities.
If we're going to read fiction about people more or less just like ourselves, shouldn't it enlarge our understanding somehow, or -- perhaps more pertinent -- shouldn't it hurt a bit?
People were obviously flattered that the Mayor — or, what is perhaps more pertinent, a billionaire — had taken the time to meet with them, and they kept thanking him for having driven all the way out to their neighborhood.
Prospective epidemiological studies will provide an opportunity to generate novel and perhaps more epidemiologically pertinent gametocyte data.
Prospective epidemiological studies will provide an opportunity to generate novel and perhaps more epidemiologically pertinent gametocyte data with which similar analyses can be performed and the role of human genetics in parasite transmission ascertained.
Perhaps a more pertinent question surrounds who will be drafted in to play the new roles?
Perhaps the more pertinent question is should this be the last ever series of Downton?
Perhaps a more pertinent question is whether the Giants will be close to full strength by Sunday.
