I'm also not very familiar with the inner workings of Monero. I'm able to extract from the blockchain some more attributes than the ones currently displayed on the website, such as the payment_id present on some transactions, but I don't know the meaning of most of them.
One of my next steps in my todo list is reading the cryptonote paper, so I can understand the protocol better and display the data in a more meaningful way or derive new useful data, to the extend possible.
Since you are able to extract it, adding search functionality for the payment_id field would be immensely helpful. Given the anonymous nature of Monero, payment_id's are basically the means by which the payer can prove to the buyer that the payment was actually sent over the network -- but to do so, they need to be able point to a neutral third party source (the block explorer) as proof.