A would rather see higher blocks generation time up to 120 sec per block. But even 60 sec will probably work.
The longer the better. 2 min block times would put us at a decent expansion rate of only 720 blocks per day and a blockchain bloat of roughly 262,800 blocks per year.
Current rate is set at 2,880 blocks per day and a massive 1,051,200 blocks per year.