Buying a scroll with guild marks is functionally no different then buying the skill/ability straight up with them.

Logically I understand the reasoning behind the suggestion. A long journey seems more manageable when you break it up into shorter trips. But practically I remember what occurred in xi. Certain spells being hard to come by and when you did they often had a hefty price tag attached to them. And players with out the means to obtain them were often shunned and looked down on.

In short, I am all for obtainable specialty skills/ability's to give players short term goals. I'm against players being able to control or profit from others seeking to gain them. No to scrolls.