How is it 'too hot' ? Is it scalding and giving you 3rd degree burns? It doesn't even get close to the same temperature as my MBP does, which gets really hot, and yet that is still manageable.
The current iPad uses Dual Light Bars due to production issues with the intended IZGO Displays not being able to meet QC standards, and production levels.
Therefore, a larger than desired battery and room for the 2nd light bar resulted in an increase in thickness, and heat approaching the spec limit just about 100% of the time.
The new displays are now at an inventory level whereby a single light bar, smaller battery size, and thinner case can be produced as intended. They run much cooler, and are let's say, the iPad 3S.
I do not anticipate a new case yet. Just the Display and Battery Packs. Consumers won't know the difference other than the new connector.