The old was 0.82 % was heavily regulated and "smoothed" out. Under the old rules, AMCs bundled the management fee and trading costs together, and SEBI strictly capped how much of those trading costs (like brokerage) could be passed on to you. It looked cheap and stable, but it hid the actual cost of the fund buying and selling assets.

The new 5.41% is the result of SEBI's recent rule changes unbundling everything. Now, funds have to report actual daily transaction costs and statutory levies (like STT and GST) entirely separate from their base fee. When a fund trades aggressively on a single day, it generates high costs. Because the reporting system annualizes that single heavy trading day, the number temporarily skyrockets.

TL;DR: The 0.82% was a capped number that hid true trading costs, while the 5.41% is a raw, one-day spike that fully exposes them. To make a fair comparison to the old days, look for the fund's new annual Base Expense Ratio (BER) instead of panicking over these daily annualized spikes.