Ceramic is much less soluble than glass by several orders of magnitude, so would be safer in many environments and could contain higher proportions of radioactive material generating heat. But it is even more complex to process than glass and more expensive, because there is, so far, less experience with it. That leaves cement. I know you have studied it as a means of solidifying wastes that exist as radioactive liquids. We have much good research and practical experience at Oak Ridge and recently at Hanford.
Cement is vastly simpler and cheaper to produce compared to glass and ceramics.
You can use the basically simple technology of the cement mixer at virtually room temperatures. The product is chemically closer to many natural rocks, therefore more stable than glass. Minerals have safely contained radioactive materials in nature for eons, and we replicate that mineral environment in the cement mixture. I've seen cement disintegrate in wet climates like India's. Most of that is just bad engineering.