Lel the overreaction is real, as always. Messi needs to get his penalty shit together, he has been shaky of late, but he's been quite above average penalty converter in his career and he sure as hell has earn the right to keep taking them. If he cannot fix his recent rut or he actually starts costing the team points/wins, that's another thing, but also keep in mind neither Neymar nor Suarez has shown any particular special skillset as a penalty taker, particularly Neymar who has missed his share in his limited sample size.
More to the point, as long as Messi wants to take them, he should take them. The decision must come from him.