<< The upside to the Nasdaq is intitutional investors arent allowed to dabble in penny stocks hence greater visibility on the NAsdaq. >>
While the sentiment of the statement is mostly true, some institutional investors (such as hedge funds) can invest in a penny stock. It just matters how much risk the investors are willing to take.
But on the flip side, shorting a penny stock is next to impossible (except for a very small minority). But on the NASDAQ, anyone can short.
In addition, liquidity will drop significantly. Right now, there are just over a million shares traded per day (on average). That would drop to about 25,000 shares traded per day (assuming a 40:1 reverse split). That is VERY low and most investors wouldn't want to touch that sort of stock (except for shorting).
So there are some pros, but there are also many cons.