Yeah slow burn is not a problem untill
a) You get action with side characters
b)We have seen too many times, devs drag development for years in slow burn and then either abandon it right before 'the deed' update or botch the 'the deed' update with so poor quality that it feels like all these years following the game was pure waste of time.
And the thing is the higher you make people wait, the more are peoples expectations and more chances that devs result gonna be underwhelming.
This is why i love devs that do small update in small interval of time instead of making people wait for half year to year for update.