Before I state my opinion, lets review the facts:
Vegeta has three special attacks (not including generic)
All of the above beams are available only to Vegeta (Save the gallit gun)
Final Flash: One of Vegeta's beams is arguably the strongest move in ESF (Considering the spirit bomb must be used in normal form therefore the users pl is less than the super saiyan vegeta)
Goku has one special beam the KHH, which is also used by Cell and Gohan
Now, by that logic, Vegeta clearly has the upperhand over Goku, Goku's only advantage is that his KHH is stronger than the gallit gun, which as an advantage, only lasts till both characters trans, which ultimately causes Goku to lose his spirit bomb and contend with a Vegeta launching loads of Big Bangs and Final Flashs.
Lets instead of comparing Goku and Vegeta's beams, we compare Vegeta and Gohan, Gohan basically has the KHH as his primary attack after trans. By equalling the beam power of GG to KHH, you ultimately unbalance Gohan even further. Who basically relies on early trans and KHH for equality. Then lets say Vegeta transforms, his pl will be massive compared to Gohan, who will get completely overwhelmed.
By increasing the power of the Gallit Gun, you remove Goku's early advantage and Gohan's late advantage it would be the same as increasing the min trans level of Gohan and Trunks to 2 mil instead of 1 mil.
Thats my opinion.