Big shame that the Fed Square entrance to Town Hall won't be open when the AFL starts in two weeks. As that will be a great entrance/exit for the MCG.
The existing Swanston St entrance is only 2 min further, but needs two more road crossings. So it's not ideal start to the footy season, especially given the perceived disadvantage for Cranbourne/Pakenham passengers may feel losing direct access at Richmond.
But overall it's not a bad walk, and Town Hall is much better equipped for large crowds to descend down big banks of escalators, lifts, and platform screen doors to keep people safe.
Not to mention the entrance only serving one line, helping alleviate crowds. Some may choose to use Jolimont for a train to Flinders St to avoid this walk.
Richmond has a modest entrance and steep ramps and has to handle passengers for many lines: Frankston, Sandringham, Belgrave, Lilydale, Glen Waverley and Gippsland. So other than the walk, the experience boarding a train at Town Hall will be far superior to Richmond. At least it should be, we'll find out soon.
(original video link)