Currently 1 IG hour = 6 minutes RT. 2 hour intervals before resting = a 12 minute wait.
Which in turn makes...
1 day IG = 2.4 RT hours
1 week IG = @17 RT hours (16hr48min exactly)
1 month IG = @3 RT days
1 year IG = @36 RT months (just more than a month)
I really don't see how altering the hourly rate /up/ to 10 minutes RT per 1 hour IG dramatically changes much more than the pace of seasonal time. Rest time becomes 20 minutes not every 12 minutes.
1 day IG = 4 RT hours
1 week IG = 1 RT day + 4 hours
1 month IG = 4 RT days + 16 hours RT
1 year IG = 56 RT days (or almost 2 months RT)
This does little to diminish high level casters volume of spells, it does extend the duration of said spells.. but given a rest every 2 hours regardless of the time scale does very little in overpowering them. If anything it hamstrings them if they exhaust their spells to quickly (which in my opinion makes a foolish caster). So they have to wait an extra 8 minutes until they can replenish their spells, oh boo. If anything this does hamstring a low level caster the most, but then they are weak in power and should be making intelligent use of the spells they have, instead of just spamming the key knowing they can rest a few minutes away again. This would promote more intelligent caster usage (not saying that the current community of caster are -not- that in the slightest) by mediating their abilities more. It does make benefit of the casters that rely on duration magic by prolonging the energies of their spells both lower and high level. Making them a greater value to this that can use the powers with cautious care and intelligence.
Increasing the time frame allows an extension of the daily cycle of activities for those role playing scenes/ day to day tasks (especially for crafters)/ large RP events that involve multiple character interaction+conversations and events requiring timing for situations. Especially when it comes to regarding IG time constraints such as curfews and IG mechanics, it allows players to navigate their time more effectively. This extends to the night as well, leading to longer events for dramatic flare, building of suspense, fear and superstition.
I've always found it bit silly that a conversation between two or more players end up spending the entire length of the day, when the conversation in itself would have concluded within the span of an hour or few. Now I understand that IG conversations are typed, which is not a very speedy method of role play... as well not everyone's WPM (words per minute) skills are the same. Myself if I'm not having to take a moment to think out clearly what I'm trying to say (or simply have a brain fart and word block) can spit out conversations at 40-50 WPM easily enough. If I'm type pasting something while reading it .. that can easily double.
Another benefit to what was mentioned as well.. is the addition of longer nights/days during the seasonal changes. That would really really be a nice dynamic effect. Having a winter season running with 8 hours of light and 16 hours of darkness.. and in the summer have 16 hours of light and 8 hours of darkness. Again it makes for building up a fear or elation that would commonly be associated with the changing of the seasons.
my $0.05.