In addition to @Rose's comment about the badly constructed second sentence (it's not a sentence at all), there are a few other things to consider.
- You have two spelling errors. They're probably simply typos but they're errors nonetheless
- Your third sentence is mixing active and passive speech and not in a particularly elegant way.
- @Rose is correct to note that your phrase is common, and one of its meanings does fit here, but I'm not sure it's the best choice. Merits and demerits can indeed refer to advantages and disadvantages, but they can also refer to successes and failures, or even to positive and negative points of a person's character, and so on. You might consider alternative phrases.
- The word "this" is in your third sentence is ambiguous. Context suggests it is referring to the essay topic, but strictly speaking it could also be referring to your first sentence, or your second problematic sentence fragment, or to whatever combination you come up with to repair that fragment. Since this is an essay about communication, presumably you'd want to communicate clearly, so I'd suggest fixing this too.
This is ELL, so I'll leave it at that.
(But -- he says, not at all able to leave it at that! --- but you might also want to consider just what you are trying to say in your first paragraph. What exactly are you trying to achieve with that all-important opening of 50-odd words? What change do you want to create, in the mind of the reader, in the brief few seconds between them reading that first "Current..." and that final "...analyzed".)