I would agree with you if it wasn't for one thing. What could you give paladins instead of designing the class around FoL, that the other healers don't have?
I would probably buff Seal of Light heavily. Something like this:
Seal of Light
14% of base mana
Fills the Paladin with divine light for 2 min, healing up to 5 friendly party or raid members for [A * AP * WS + B * SPH * WS] with each melee attack. Only one Seal can be active on the Paladin at any one time.
Unleashing this Seal's energy will heal the friendly party or raid member with the highest threat for [C * AP + D * SPH] over 20 sec. (Does not stack. A, B, C, D are values such that the ability is balanced and worthwhile)
Effectively, meleeing with Seal of Light takes over the mundane maintenance healing that we use Flash of Light for. We use the Judgement to maintain a solid HoT on the tank with duration matching the duration of the Judgement effect. We have Holy Shock, Sacred Shield, and Holy Light for responsive healing. I'm not really sure where Beacon of Light would fit in.
Actually, it might be interesting to use Beacon of Light like a focus target. If you cast Beacon on someone, your Judgement of Light HoT automatically targets them, and maybe something similar happens with Holy Shock (Shock hits the enemy and heals the Beacon target). Beacon would have to go much lower in the tree though.
Essentially a normal paladin would have somewhat undirected healing, but a Holy paladin would be able to focus her healing through Beacon of Light. I'd have to think about it a bit more, but I think there are some possibilities with this scheme. It fits nicely with our niche as a single-target, tank healer. Effectively we're duplicating WAR's defensive target scheme on a small level. It's not a true defensive target, but it would be enough to get some of the same style as the warrior priest mechanics (which I've praised in the past).