Actually 4.5 is not that bad either! As suggested by others just use a lot of swtich words such as hence, therefore, however, alternatively, moreover etc. Also use words like persuasive, plausible, laden with bad assumptions, logical fallacies, etc.
Do not hesitate to address the ISSUE from both sides but do take a clear position in your conclusion section.
Practice in actual GMATPrep screen to be more comfortable at the test
Do NOT put more effort in this section than it deserves. Be confident and you will be fine.
Once you done with this section do not think about back and during the break remind yourself that in the coming quantitative section after first few questions you will not spend too much time on any one question. Practice exhaustively this technique.
Good luck!