Yes it is a little warm, and yes I can put it to sleep with lid open. Also see activity in Console at the time it is supposed to be sleeping
Some of the text in console :
10/3/15 9:18:00.000 PM kernel[0]: AppleCamIn::handleWakeEvent_gated
10/3/15 9:18:00.000 PM kernel[0]: AppleCamIn::handleWakeEvent_gated
10/3/15 9:18:05.744 PM com.apple.CDScheduler[260]: Thermal pressure state: 1 Memory pressure state: 0
10/3/15 9:18:05.746 PM com.apple.CDScheduler[42]: Thermal pressure state: 1 Memory pressure state: 0
10/3/15 9:18:14.965 PM com.apple.CDScheduler[260]: Thermal pressure state: 0 Memory pressure state: 0
10/3/15 9:18:14.965 PM com.apple.CDScheduler[42]: Thermal pressure state: 0 Memory pressure state: 0
10/3/15 9:18:25.283 PM mDNSResponder[89]: mDNS_DeregisterInterface: Frequent transitions for interface en0 (192.168.0.12)
10/3/15 9:18:25.283 PM mDNSResponder[89]: mDNS_DeregisterInterface: Frequent transitions for interface awdl0 (FE80:0000:0000:0000:7C44:42FF:FEC5:8FCD)
10/3/15 9:18:27.000 PM kernel[0]: PM response took 1951 ms (52, powerd)
10/3/15 9:18:27.000 PM kernel[0]: ARPT: 10394.204788: AirPort_Brcm43xx::powerChange: System Sleep
10/3/15 9:18:27.000 PM kernel[0]: ARPT: 10394.204810: IOPMPowerSource Information: onSleep, SleepType: Normal Sleep, 'ExternalConnected': No, 'TimeRemaining': 956,
10/3/15 9:18:27.000 PM kernel[0]: AppleCamIn::systemWakeCall - messageType = 0xE0000340
10/3/15 9:18:27.000 PM kernel[0]: en0: BSSID changed to xx:xx:xx:xx:xx:xx
10/3/15 9:18:27.000 PM kernel[0]: en0: channel changed to 11
10/3/15 9:18:27.000 PM kernel[0]: AppleThunderboltNHIType2::prePCIWake - power up complete - took 1 us
10/3/15 9:18:27.000 PM kernel[0]: AppleThunderboltGenericHAL::earlyWake - complete - took 0 milliseconds
10/3/15 9:18:27.000 PM kernel[0]: AirPort: Link Down on awdl0. Reason 1 (Unspecified).
10/3/15 9:18:27.000 PM kernel[0]: ARPT: 10394.660913: wl0: leaveModulePoweredForOffloads: Wi-Fi will stay on.
10/3/15 9:18:27.000 PM kernel[0]: ARPT: 10394.688161: AirPort_Brcm43xx::platformWoWEnable: WWEN[enable]
10/3/15 9:18:27.000 PM kernel[0]: ARPT: 10394.689113: AirPort_Brcm43xx::syncPowerState: WWEN[enabled]
10/3/15 9:18:27.000 PM kernel[0]: in6_unlink_ifa: IPv6 address 0x68a3066a3201150b has no prefix
10/3/15 9:18:27.000 PM kernel[0]: IOThunderboltSwitch<0>(0x0)::listenerCallback - Thunderbolt HPD packet for route = 0x0 port = 11 unplug = 0
10/3/15 9:18:27.000 PM kernel[0]: IOThunderboltSwitch<0>(0x0)::listenerCallback - Thunderbolt HPD packet for route = 0x0 port = 12 unplug = 0