Ability Points Increase

Rules as Written

Gain 2 ability points (to a maximum of 20) on levels 4, 8, 12, 16, and 20, as written in the PHB page 59. You may also take a feat in lieu of the 2 ability score points.
Fighters also gain an additional 2 ability scores at level 6 and 14, and rogues at level 10.

House Rule

In every instance where a PC can get 2 ability points or a feat from levelling up, you now instead gain one ability point AND a feat. This also applies to the fighter and rogue additional increases as mentioned above.

Rationalisation/Reason for the Rule

D&D is the most fun when characters are complex and unique. This rule will allow every player make a unique decision every few levels to build the character they want.