Hello Saran
BCS / BPC in MDG works fine. You just have to configure it as per the config doc, Few things keep in mind -
1. Consolidation group account - its FSI and FSIH entity type. You must add it in GL edition
2. Create FSIH first and then assign FSI to it.
3. Replicate FSI first and then create GL accounts
4. Use SOA services as its the best way of replicating the accounts and I found it easy.
5. In the CR type for FS item, add hierarchy and group. Its like PC and CC hierarchy / group replication
6. You have to first add company in MDG or you get error
7. Make sure you create sub-assignments i.e your breakdown category too to avoid errors.
With the std config and keeping these things in mind, you can easily govern consolidation master data in MDG.
Kiran