I think they've just went the honest way, showing how it sounds like without any edits.

True on some presentation methods among devs in the business. I think it just shows that quite some are very good devs, but not so good on the PR. Unfortunately, you sometimes get the other possible combination, the one with a ton of PR and poor products.
I also saw scenery getting promoted with a ton of edited screenshots, planes too (not CS!). When looking at some videos, some companies edit extra raindrops, use a ton of bloom and so on. Sometimes the product is really good though and those edits actually harm it in my humble eyes.

Back to MCE. I think some current videos would help. However, as there is a trial version, everyone can test how good the new voices really are.
And on PFE. I think Youtube may offer some ingame videos. Unfortunately, it doesn't offer a trial.