The phrase "a more vague" is not correct in standard English; it should be "vaguer" or "more vague" without the article "a." You can use it when comparing the level of vagueness between two or more things, but it is more common to use "vaguer."
Example: "The instructions were more vague than I expected, making it difficult to complete the task."
Alternatives: "less specific" or "more unclear."
His own preference was for a more vague formula – single figures perhaps.
Younger children may have a more vague pain or stomachache, making the condition harder to diagnose.
As geopolitics evolved, the enemy Arab easily morphed into a more vague enemy: the Muslim (a much larger group).
The Bush administration has repeatedly rejected a timetable for withdrawing troops, agreeing only to a more vague "time frame".
All states save Mississippi and West Virginia allow a religious exemption for vaccinations, and 20 states also allow a more vague philosophical exemption.
A cease-fire was always the goal, but in public American officials talked about securing a "de-escalation" of the conflict, a more vague and less demanding objective.
But the Europeans had to drop their insistence on targets for renewable forms of energy, settling instead for a more vaguely worded promise to act on the issue "with a sense of urgency".
I'm sure we moved to Acomb because, as one of those countless families to leave London smog behind in search of a more vaguely bucolic lifestyle, the house at 29a Beckfield Lane must have seemed like the most perfect end-goal imaginable.
"But this idea of a solution is a little more vague with contemporary artworks.
So it's probably my duty to warn you that it is quite wordy, and sees things from a North American angle, and is a bit more vague about renewable energy than I'd like.
Coachella, on the other hand, is a much more vague, diffuse kind of beast it is an aestheticized striving for desert hippiedom, divorced from any ideology.
