My opinion about who is going in heaven and who doesn't is this:
All real born again christians will bear fruit.The Word of God says clear that we will know them after their fruit.In some christians is more obvious than others depends on their level of maturity in Christ.The Lord looks at the heart not at the level of sanctification you have reached,even if that is very important too.That is the work of the Holly Spirit in you.
I believe that those who didn't fully decided and dedicated themselves for Jesus and therefore didn't allow Him to work in them through the power of the Holly Spirit or those who were decided and dedicated once and are not any more by their own will,
they are not abiding in the Vine which is Jesus.
I believe it is through grace that we get to heaven the grace we have in Jesus if we belong to Him.It all comes down to that:if you have Jesus or not.Only He knows in whom He resides.He who has the SON has LIFE.