People who complain about the update length don't realize the amount of effort it takes to designing/remaking game mechanics. Features like indicators, sms system, battle system etc. takes time to design, develop and test. He had to do all this (+ working full time in a foreign land + facing multiple real life issues) and still provide enough content to call it a 0.15 update, all within a month.
I feel like people are too spoiled from the usual update speed from Fujino. For reference, you could look at western patreon devs and see how they would take at least 3 months to achieve whatever progress Fujino does in 1 month. While plenty of Japanese devs takes at least a year to complete their basic RPGM game, devoid of any fancy mechanics.
If he continues to work at this speed, don't be surprised if he finally burns out and call it quits. He has to live on a very unhealthy schedule to deliver unrealistic expectations as a solo developer.