Types of visa for multiple entry into Malaysia?

Hello,
I would like to enquire regarding the type of visa for a foreigner in Malaysia for a few different scenarios, please correct me if there's any wrong information and kindly assist to answer the questions that i have below.

For someone that has already been in Malaysia for 5-6 years :

The requirement is that these visa has a card that allow the applicant to move through the immigration line without stamping on the passport, the benefit and restriction.

1. MM2H
- no longer has exemption from import duty of import car or tax free of a locally assembled car?
- not eligible to work below age 50, and can only invest in local Sdn Bhd company. Will this also apply if the person is a director/shareholder that already have a joint venture company in Malaysia?
- if the person already has a expat work permit, can he still apply for a MM2H?
- does this program gives him the freedom to move seamlessly through the immigration line without stamping on the passport?

2. Residency Pass Talent
- does this program gives him the freedom to move seamlessly through the immigration line without stamping on the passport?
- apart from the person not having to be tied to any employer and has a 10 years validity, is there any difference of applying for a ESD DP10 compared to this?

For new foreign investors :

1. Is it better for them to apply for MM2H or invest in Labuan work permit if the person has no intention of working in Malaysia, but only as an investors and to move freely in and out of Malaysia?

2. Does the person has to setup a company in Labuan to benefit from this visa or it can be in West Malaysia too?

2. If the person was blacklisted by the Malaysian Immigration Dept, is there an option for appeal or penalty pay to clear the person from the list and allow them re-entry into Malaysia under MM2H or Labuan work permit or the person has to wait out the 5 year ban before investing into any of them?

All help and additional informations are extremely appreciated. Thank you!