Accessibility Request: Visual Impairment Improvements

Hello, I am visually impaired and have encountered a undesirable level of discrimination in the form of a lack of cooperation while playing. I therefore have a suggestion to improve the UI/HUD as to be more friendly for persons with visual impairments. (This would perhaps be of no use to blind persons.)
I have found most people find the Markers (placed on targets) to be too disruptive and in their way. I mainly heal and therefore prefer to mark, at least, the tank in order to do my job by ensure the health of the tank and the rest of the party.
My suggestion is this. On the HUD, marks placed on targets show to the left of the target HP bar while you are targeting them. I suggest presenting an optional settinig to have either Roles or Class/Job icons in this place. The marker, if present on the target, superseding it of course. This preventing persons unnecessarily needing to be marked with things like a Square for example, and allowing visually impaired persons, such as my self whom cannot read the name of the target while in combat, to be able to ensure they are targeting the correct person. This would also come in hand to perhaps more quickly identify party members Role or Class/Job to more quickly and appropriately grant buffs.
I hope this finds its way before the right eyes and can be implemented soon. Thank you.
P.S. Being able to change the size of the Help Tips (tooltips) would be nice as well.