Why not tripling/quadrulping certain high traffic routes to move freight/superfast and MEMU trains at the same time.
1.) ANVT - GZB (AnandVihar-Shahibabad-Ghaziabad)
2.) CNB - LKO (Kanpur - Lucknow)
3.)...
more... PRYJ-DDU (Prayagraj - DDU)
4.) BSB-DDU (Varanasi - Pt. DDU)
5.) JL-BSL (Jalgaon - Bhusawal)
6.) NGP-WR (Nagpur-Wardha)
7.) SBP-JSG (Sambalpur - Jhaursuguda)
8.) ARA-PNBE-FUT (Ara-Patna-Fatuha)
9.) CPR-HJP (Chhapra- Hajipur)
Quadrupling of lines in ER (moving towards HWH) and SR (moving towards MAS) are great. More such high density routes are urgently needed.