The post Mike Shea humbly submitted to Ray Winninger.
I love 5th edition Dungeons & Dragons. Many have complaints, some justified, and some making mountains out of mole hills. But none can ignore how successful D&D 5th edition has been over the past eigh...
slyflourish.com
His main points are: Make 5.5 Fully 5e Compatible. Include Easier Encounter Building. Include "Theater of the Mind" Guidelines for Combat. Strengthen High-CR Monsters. Fix Certain Spells and Abilities. Include Tasha Upgrades. Provide Less Problematic Race Descriptions. Update the System Resource Document under the Open Gaming License. Leave the Rest Be.
Of those only one or two need any more explanation than the above. And a few of them we've been told are definitely how they're moving forward, such as backward compatibility, and they've already included others into newer products, such as Tasha's racial bonus flexibility and beefing-up higher CR monsters (as seen in Monsters of the Multiverse).