Well I cant exactly develop these because there on powerpoint, so this is as good as it gets, but thank you for understanding.
Yes you can. You can source better images, you can pre-render stuff in other applications and embed it into the Powerpoint file, you could abandon powerpoint and rebuild it in another package which allows better results, you could render specific parts of the ident outside of powerpoint to full quality. And if, for some reason, you can't do any of that, you should as a minimum describe in your OP, exactly what changes you'd make, and how it would look when rendered for use - otherwise people will think that what you've posted is what you expect to see on screen - and do you honestly see ITV1 using this as is?
Finally, you could come up with a full description of what the ident is, how it develops, how you see it being used and how you feel it fits into the rest of the ITV1 package. You could also do some screengrabs of the resolution of the ident and incorporate them into your post so that people can see what it is you're telling them to download.