Yes, DC10s replaced 734s for domestic. This will add frequency on the once daily CGK-UJP-MDC, as Lion and Mandala have launched a lucrative 2x daily flights. This enables people in Manado to leave in the morning instead of lunch time. Garuda's been eye-ing this extra flight for a while. Furthermore, CGK-MDC direct could also happen when the extra 737s come in. Other segments with DC10s on domestic is only CGK-DPS... Which utilises idle widebodies anyway. Don't think the 734s will enter this segment much.
Informers at GA have told me GA plans to use 772s for CGK-Zurich, Rome and Paris. Originally, the 772 was supposed to go CGK-NRT and FUK and Nagoya. The A330s have filled these routes with good results. But in times of bad wx, the A330s tend to show it's slower speed, something that GA is not happy about. NRT is now served by A333 and 744.
No plans on the 742s yet. 742s will be relegated to middle eastern duties (Jeddah, Riyadh and Dammam). Plus the 742s are still useful for Hajj duties.
When losing situational awareness, pray Cumulus Granitus isn't nearby !