I am impressed with your useful thread, OP. Good work.
5. Presence of Actual Volume: Unlike most centralized exchanges where bots are used, there are no bots on decentralized exchanges. This invariably means that you will know the actual volume being traded.
Not always. On decentralized exchanges some traders occasionally sell crypto-currencies to themselves in order to show fake price transactions to other people or due to personal reasons.
4. Low liquidity: Due to lack of awareness, some decentralized exchanges experience low liquidity, but we are gradually tending towards that time, where liquidity will not be a problem.
Yes, this is a big disadvantage of DEXes. Perhaps it is possible to securely aggregate all the liquidity of such exchanges into one large pool but in this case a customer must have a deposit on each of these decentralized exchanges.