Solos never place at tourneys, anymore, so I think they need some sort of buff, or else it'll just stay as the, "I only know one character," option and never be a legit competitive choice.
Do they not place because it's impossible, or because no good player runs Solo?
NEC had 2 Solos in Top8, 2 more players who ran Solo in their respective matches against those Solo players (preferring 1v1!), and 2 more dedicated Solos in Top12.
To compare, there were 3 Duos and 3 Trios each in Top8. Solos never place?
I remember when everyone and their mother sold Painwheel as a competitively unusable character, and then Taluda picked her up and amongst other accomplishments won UFGT.
Since then, Painwheel rose in the public perception to the stellar spot of "competitively unviable, except if used point and backed by Fortune/Bella"
Trios were for the longest time seen as the clear strongest team size; now Keninblack thinks the Top3 teams are Pea/Bella, Fuk/Bella and Filia/Bella and three of the clearly strongest SG players run one of precisely these Duos.
I don't think SG players are good enough yet / the game is developed sufficiently to state something as large as "never a legit competitive choice".
.. People won VSav tournaments with Anakaris.
I think Solos ARE weaker than Duos/Trios; I however also think they have a much easier time winning, due to not being able to fuck up as badly (no HappyBirthdays/DoubleSnaps/.. against a Solo), having a much bigger random factor (MAN, those Reversals do damage..) and a dedicated Solo obviously being better with his character than someone who has to split practice time onto three chars.
And lastly, as very personal opinion:
If you make Solos 1:1 as strong as Teams even at the highest level, there's really no fucking reason to play a team, where you are far more susceptible to losing randomly and have to put in 3x the work.
Do you really want to limit SG with its countless assist possibilities, fun team synergies, etc to a 1v1 game?